<human>: I've been in a committed relationship for two years and I thought one day I would be able to get over her sexual past, but I don't think I can. Who she's done, what she's done, how many -- it all gets to me. 

Every guy she's had sex with before me is really jacked and good looking, which is an indicator to me that she doesn't find my body type attractive and that she's using me. I don't want to be the kind of guy who gets called "hubby" and gets cheated on because he doesn't have the self esteem to keep his gf/wife into him. I can't be that guy.

Can you provide a brief overview of the text?
<bot>: My girlfriend had a past, I didn't, and it's killing my self esteem. The guys she were with before were fit unlike me and I think she's just using me and isn't attracted to me. What do?