<human>: Can you condense the text into three sentences or less?

Disclaimer: Despite describing myself as polyamorous everything I've read suggests that it isn't actually healthy on any level and I have a feeling that even if it were my need for multiple relationships stems from a lot of weird childhood issues regarding being isolated from people, not knowing how to interact with women except on a sexual level (although I do have genuine female friendships) and having resulting very weird subconscious views about women.

In any case, my problem is this: My girlfriend is "demisexual", or incapable of being sexually attracted to people when she doesn't know them. I am almost exactly the opposite, although I still love her and am sexually attracted to her. When I met her I was already starting to feel very uncomfortable with how I treat relationships and was worried I'd end up alone, and she managed to make me commit to her. However, after she off-handedly mentioned that she wouldn't dump me if I slept with someone else, I instantly started to want to have sex with *every* woman. This came to a head yesterday and now I'm worried it's going to eat away at our relationship unless I can stop wanting to, because not only is she going to think about me being with other girls, I'm going to feel really uncomfortable being in this situation because I'd feel like I have to cut off contact with the vast majority of people I know to keep from either thinking about cheating or actually doing it.

I would really, really like advice from other people who have been in this situation, preferably from people who managed to change from being really promiscuous to monogamous without it completely eating away at them.
<bot>: man who is "polyamorous" (read: cheating asshole) has normal girlfriend, wants to not be polyamorous and does not want reassurance that his behavior/thoughts are completely normal/healthy.