<human>: Can you summarize the given text in a few sentences?

My entire life I have been known as "The Best Friend". I am really nice to women, and to my dismay that back fires many times when I get romantically interested in them. Little Background on me Im a 5'11 220 pound big guy... So naturally there are some self confidence things, but overall I am happy with myself. After joining a Fraternity and spending two years working on myself and having some escapades with women I finally found a great girlfriend. Everything is wonderful, she is smart,funny,witty,charming, and beautiful. There is however one problem, she has a guy friend from high school that she was really close with that she has not seen for a while. Well he came back into her life yesterday and they have a tendency to kiss on the cheek and hold hands and things of that nature. Not to be super jealous boyfriend, however I have been in that position of the guy friend and I don't really trust him. Living an hour away from her further makes my trust for him diminish, Is there something I should say or do to express my trust for her but my displeasure for the high school romantic friendly gestures.
<bot>: Have a girlfriend with a guy friend who are really close they kiss on the cheek and hold hands and being a former friend zone expert I know what he wants, how do I handle the situation.