<human>: My boyfriend has mentioned a FFM threesome quite a bit in the past year that we've been together. Each time it's brought up I die a little inside. I know myself enough to know that I'd feel really jealous. Each time he's brought it up I've fully stated that I personally can't and wouldn't be able to handle it and that if it's something that he wants than I want out of the relationship because I could never give him that. I don't want to share him and thats, that. I think he's getting the hint now to never bring it up, but now that I've looked back into our entire relationship, he's asked about it a lot. (at least more than I'm comfortable with) Now after our last conversation about it I can't help but imagining my boyfriend enjoying other girls and it's really putting anxiety and stress over me. I know it's something that he'll always want and it's something I could never give to him. I feel sad because it makes me feel that I'm not enough. I honestly just want to move past this reddit and not think much of it. But how can I when I know it'll always be something that he wants? For the record, my boyfriend is a really great guy and we're compatible with each other in so many ways. Our lives mesh incredibly well together and he recently asked me to move to San Diego with him once he's finished with college. We love each other dearly, and I'd pretty much do anything for this man except that. Anyways I'm just feeling really down about it and I'd appreciate any advice to cope with this. Thank you for your time.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I feel shitty not being able to give my BF a threesome, how do I just forget it and move on with our relationship?