<human>: Can you give me a shortened version of the text?

My gf and i (m/f 20) have been together for about 6 months now.

before we were together she was dating one of my good friends. I was supportive of them and honestly hadnt ever thought of her in a romantic sense (not that she wasnt attractive, but that the idea of dating her simply didnt register at the time.)

They were together for almost a year, were each other's firsts and had alot of experiences together (many of which i have also had and heard about). They broke up, and 2 or 3 months later we started dating.

Our relationship is great. We get along very well, her family and friends like me and we havnt really had any issues at all. We also both continue to be friends with her ex, which is the reason i am posting this.

There are times where i'll come over and she'll be helping him with homework or have invited him to dinner with us (if we happen to be eating together). It's stupid, but it bothers me that they're such good friends. I guess i'm just jealous of what they had even though what we have now seems better.

I have been basically ignoring this feeling due to it's unreasonable-ness and just decided it might be easier to ask reddit what you guys think.
<bot>: my gf is really good friends with her ex who also happens to be a pretty good friend of mine. I get unreasonably jealous at times. What do?