My girlfriend of a little over a year is very wonderful. I am very happy with her, and I think she is happy with me. Recently there’s this guy who had been a little too flirty with my girlfriend. They don’t know eachother THAT well and he doesn’t know me THAT well but he is always talking to her and touching her in some way. This can be as subtle as a tap when laughing but he’s actually put his arm around her a few times. Also, it seems like more and more often when I text , “what’s up” she’s face timing him. Should I be worried?