Relationship doubts

My boyfriend has knocked my confidence and not purposely but out of stupidity. For example, we've been out drinking with a group of friends and this girl walked by, very beautiful girl may I add. My boyfriend in front of all of our friends said out loud 'ohhh waw' looking at the girl as she went by. A build up of events like this has made me feel really crappy about myself and the way I look. Every time we do spend time together he's trying to initiate sex. (It isn't always a bad thing but a relationship is not just built on sex). I refuse and he goes extremely moody with me or he will attempt to get me in the mood by touching me and trying to take my clothes off and when I tell him to stop he doesn't listen. He can be so good at times and I do really love him but right now I feel so unhappy. He's made comments in the past asking what those white lines on my legs are (stretch marks) and he's even asked if I'd ever consider cutting my hair short. I just don't feel very secure with him and I don't feel happy or loved at times. 🙁 I don't know what I should do.