I've been dating a guy for 5 months now, originally agreed neither of us were looking for a serious relationship we just enjoyed each others time. We spend every night together, not sleeping over, just eating out or grabbing a drink. He's now started showing jealousy signs when I receive male attention, totally innocent attention but it makes him jealous, I don't understand that part fully as he makes everyone aware he's not my boyfriend?? He has a 'good friend' who he messages quite a lot and he has always been totally honest with me about her, she lives a few hours away so they don't see each other, the only thing is when I say something about her he gets very defensive and we argue about it. She rings him constantly and if he doesn't answer she gets really nasty with him, so most of the time he will answer and ask me to be quiet or he will rush home so he can talk to her. Am I missing something here? 