Pleaaaaaaase help ??

So I have a boy bf & I'm really starting to fall for him but I think it's only because we are having sex , since we started having sex my feelings for him have gotten very strong but I sometimes think it's only because we are having sex ... like sometimes I get mad when he does things in my face & when I hear things about him , I get jealous when I see him with other people , its just alot of things that I'm feeling right now , I just don't know what to do ?? please help me , ANYONE !