Stuck in my own head

So I have been dating this guy for over 2 years, and he has been in relationships before so it's not like he's completely new at this, but he is always very close with his female friends. Personally this really bothers me and I have brought it up to him before and he doesn't understand because he feels like he shouldn't have to change. I'm also very weary of where he is a lot. As strange as that is I'm extremely paranoid if he's with other girls or not or if he's lying to me about where he is just to get out of something. Over the years I've had to accept that him hugging other girls and being very friendly with them is just how he is, so even though it bothers me I just have to live with it. I've never been cheated on, but his actions speak louder than his words. He has asked one of his female friends to come over in a thong so he could give her a massage. I don't really know what to think he hasn't done anything lately that would have me suspicious but I feel very stuck in my own head about whether or not I should feel this way. Whether or not I should feel like it's wrong for him to be spending so much time with other girls and if I should be as suspicious of him as I am. Any time I ask my friends guys and girls and they shut it down right away saying that it's wrong for him to treat me this way so I don't understand how he doesn't see that himself.

I have to agree with Susiedqq on that. I'm sure you love him so much that you have been accepting him to be so close with other female friends. Sometime I'm just wondering if he even think that you are paranoid and suspicious because of his action that cause all the problems. That is a selfish action!