<human>: Provide a brief overview of the text.

A lot of my past "relationships" have been abusive/creepy/self-centered/just all around unpleasant. For example a boy attempted to set me up as a 'pet' for his girlfriend, I have been with a few people trying to piss off or excite their gf/bf, been bullied into being a beard, and been with someone who would insist on giving me head as an excuse to pester me into returning the "favor" because he knew I hated to.

My current girlfriend, [we'll call her Amy, also 20s F] came into my life after I had a particularly nasty break up and a brief fling with a girl with a girlfriend and anger issues. She's the best thing that ever happened to me, and I'm smitten with her. But she's Ace, although not sex-repulsed. I knew this before we were dating and we have generally managed to balance our comfort zones and my sex-drive to keep us both happy. But after the last three years together I've noticed that I have a lot of anxiety and insecurities from my previous "relationships" that started coming back. It has made it very difficult for me to accept when Amy is feeling particularly uninterested in sex because I tend to think it is a fault in me, or that she doesn't care about me. It is making me feel really self-conscious and down on myself, but I also know that Amy's lack of sexdrive is not because of a lack of affection for me. However sometimes I can't convince myself she's attracted to me, especially when over a month will pass without sex and she doesn't notice or make any effort to meet me halfway to make time for it when I comment on the lack of intimacy. We have talked about having an open relationship but I do not know if that will help. I know there is no way to change her approach to sex though, and I would not want to change her for the world.
<bot>: Girlfriend is Ace, but I have a lot of issues with feeling undesirable and used which has led to insecurities and anxieties I don't know how to deal with anymore.