<human>: Summarize the given text in a few sentences.

We have been dating for the better part of a year. We've had our ups & downs and are both getting used to one another. Most of my relationships have been hot & heavy, then fade. This one seems to be mellow all the way through and I find myself creating drama where there needn't be any. Jealousy is another issue - she has loads of guy friends and one in particular that whenever i'm not around, he is. He assures me they are just friends, have been friends for years and it's never been that way between them. Ever. She even seems disgusted when I bring it up or laughs like it's ridiculous I even thought of him as competition. She says I'm acting crazy, but I feel like my feelings are grounded in some points. How can I regain my confidence here because I feel like I"m losing my mind over this girl who I really have fallen for.
<bot>: need to chill out in my relationship because it's ruining my credibility with the girl i'm with. how can i do that?