HI Brit2k2 …
Maybe I am missing something in all of this, but what I think I am understanding in all of this is that you (or some part of you) seems to think that you must have two different identities in order to be happy with yourself. Do I understand correctly?
If I am understanding correctly, then I suggest that is not healthy for you, not respecting of yourself, not respecting of any of your partners including your boyfriend, not possible to maintain long term without really messing up your head, likely to blow up when you least expect it and can cause huge damage – imagine if you have a child with your boyfriend or one of the other lovers, and is not fair to your boyfriend.
Perhaps you have already explained it and I have not understood it, but… WHY would it not work for you to develop your relationship with your boyfriend to include the kind and level of anal (and whatever) activity that your heart, body, and compulsions require. (You are doing it already with others, so it sounds like something that is required for your happiness.) …
… The transition that would be necessary with your boyfriend might be a huge surprise to him (perhaps he will be VERY happy about it???), but the way I see it, you have nothing to lose and everything to gain by having a more complete and integrated relationship with your boyfriend.
I am NOT NOT NOT suggesting that you should tell you have been doing. If you do that, he will likely be gone in a heartbeat. – Either that is what you wanted (him leaving you) to happen all along or there was something big missing in your relationship with him that prevented you from being your WHOLE SELF with him. However, please do NOT hurt him any more than he would be hurt already if things don’t work out for the two of you. …
… What I AM suggesting is sitting down with him and telling him something like: “Prior to meeting you I had some experiences with anal sex [or whatever] that I have come to realize that I have really missed. I don’t know why I have not talked with you about this before – I should have talked with you about this quite a while ago, but I was afraid to disrupt the great thing we already had going, and I was embarrassed [or whatever] and did not know how to bring up the subject. However, I now realize that anal sex [or whatever] is very important to who I am and I want us to talk about and implement changing aspects of our sexual relationship to include [whatever it is you want to be doing].”
If that approach does not appeal to you, then perhaps you don’t REALLY have the feelings for your boyfriend that you are saying that you have. (We all, especially at your age, do or avoid doing, some stuff that we have been “programmed” to do, but that is not really our true self.)
If there is some aspect of you that, for some reason, does not want, or is not able, to have the entire range of sexual activity with one person, then I suggest that you are not yet ready to be with one person. If you cannot be with only one person, I suggest that you instead do one or more of the following.
a) For now, give up on the idea of having a single boyfriend or partner until you are ready. (A few years will likely make a huge difference in how you feel about this subject.) Let your boyfriend be free of your need to be non-monogamous and your lack of ability to share your whole self with him. Let him move on to a relationship that will be healthier and more complete for him. That also frees you to be you without having to worry about this stuff (in regard to your boyfriend).
b) AND/OR seek out multiple boyfriends / partners / lovers, with ALL whom you are TOTALLY HONEST that you are polyamorous, you are NOT seeking monogamy, and you are not seeking a committed long-term relationship with one person. ABSOLUTE AND COMPLETE HONESTY.
Other than trying to be respectful of your boyfriend and not hurting him by telling him stuff (about your current activities and your recent past during his tenure) that he does not need to know, I suggest that from this moment forward that you become a completely honest, transparent, and open person. That can happen either with your boyfriend, or with future relationships. If you choose to follow that path, I think you will find tremendous relief that you no longer have to lie every day to people you care about.
Yes, not telling a boyfriend about ongoing activity with other people IS ACTIVE LYING. I am sorry, but there is just no way around that conclusion under my personal standards. However, not telling a boyfriend about PAST activity is a “white lie by omission” which, depending upon your moral and ethical standards, could potentially be acceptable to avoid hurting somebody you love. By my personal standards, a “white lie” to protect somebody you love is sometimes okay as long as it is not about a current / ongoing / future activity. However, a “white lie” to protect yourself is just a plain and simple lie. If one has to lie to others to protect oneself, that is a problem and is not fair to the other people – and in the long term, it can seriously hurt oneself.
While your particular situation is a little on the extreme side, a LOT of people, especially at your age, get themselves into ethical and moral conundrums. You are NOT ALONE in this. What makes the difference for the future is whether or not you “do the work” to develop your own (not programmed) morals and ethics, and then apply them.
Lastly – I have already said far too much – my own personal approach to life is: If something is going to eventually happen anyway or needs to eventually be done, BE BRUTAL and DO IT NOW. Otherwise I will suffer the long-term unhappiness of “a thousand cuts” and the resulting long-term damage to my mental health, instead of standing up, being brave, being kind, being honest, and doing what needs to be done… NOW. It feels SO MUCH BETTER to do the right thing (whatever the right thing is for me). I cannot even begin to tell you how much I now wish I had understood that when I was in my teens, twenties, and thirties. I wasted decades of my life until I understood this.
I wish you the best of happiness and success in your life. You are in charge of defining what happiness and success mean for you.