I dont know what to feel....☕

My thing is... My friend is from Germany and he came here to America because he was in flight school and I mean we talked or whatever but we could never date because he lives in another country. We saidbwe would stay being friends but decided to date long distance for 4 months. but it didn't work out so we broke it off and a year later he start talking with someone else and now all of a sudden he's become distant and told me that his girlfriend does not want him talking to me because she's worried I don't see why she's worried because they live in Germany and I'm here in America I'm a little pissed off that I can't talk to him I don't know what I should feel or say what do you think??