<human>: I've been with my first girlfriend for 2 months now, and although it's stupid and silly and immature, I have huge insecurities with regards to her (only) previous relationships. It lasted a year and half, until about 6 months ago, and she says that she wasn't happy in it, although she was the one to be dumped. She hasn't talked to him since.

I'm generally a somewhat insecure kind of person, deep down. It's not something that I show to broad daylight, but I can feel it in my everyday life. 

And now, that I'm in a relationship with this wonderful girl, if I'm being totally honest, the thought of her having been in a relationship with another guy *kills* me. I'm always imagining them having sex, hanging out, making out, and I sometimes I feel like I'm in a competition with him to be the best boyfriend. Again, I know it's not how a normal person should feel, but I just can't help it.

When she talked about the travels they made together, I felt *sick*. I imagined them having such intimate and precious moments together, and I couldn't help feeling extremely bad about it. Same today: she called me by her ex's name. I know it's something that happens to all of us, but I felt very very shitty for the whole day.

And the best part of it is that she tells me *constantly* that I'm the best she's ever had, and that she's way more happy than me. I don't really know what's wrong with me.

Can you provide a brief overview of the text?
<bot>: My first relationship. I have troubles accepting the fact that my girlfriend has been in a previous relationship although I know it's wrong to feel that way. How do I cope?