Advice please!!

Kyla

So my boyfriend is such a sweetheart and is extremely nice to everyone. And girls tend to take things the wrong way all the time and think he’s flirting and end up liking him. Keep in mind he offers his jacket to them and is constantly like helping them out and acting like their boyfriend instead of mine :/. I tell him I don’t like this and ask if he could take it down a notch (I did not ask him to be mean, but to like not offer is jacket and do boyfriend things to other girls) and he got upset. I told him I don’t want him to be mean and he knows that but he’s still upset. What do I do? It hurts me a lot because it’s annoying to see and witness a random girl wearing MY boyfriend’s jacket and stuff.