Boyfriends anxiety

Lily

Me and my boyfriend think he might have anxiety. He often says he feels a weird nervous feeling in his stomach and a tightness in his chest . I’ve asked someone about it before and they said he just needs exercise, but that’s not the case either. He’s in basketball school so he trains and exercises a lot everyday. He has a hard time expressing how he feels sometimes, which is understandable . But could that be the reason why he feels anxiety? He says he feels it a lot at night times too… what does this mean? I absolutely hate having to watch him go through this and I don’t know how to help.