He's admiring your bosom, but he's trying to be faithful to his girlfriend. In which case, he should keep his observations to himself. This is WAY too familiar to be talking to someone like that who is NOT his girlfriend.
It means you have a nice set of breasts.
It means he approves of their breasts. Depending on the guy and girl, it is either a great compliment or a perverted observation.
When a guy says he would date you if he didn't have a girlfriend, he is being nice and letting you know that he is already taken and that you would be someone that he would consider dating if he wasn't already with someone else.
It means that you are a nice person.
If mean she/he wants you as a girlfriend/boyfriend
It means he thinks you have a nice butt but doesn't like you.
It means your in buddy
That he likes you and want you to be his girlfriend.
lots of love
He will be friends with you but doesn't want a boyfriend/girlfriend relationship. He doesn't want to date you. We all know people who are nice but we don't want to date all of those nice people.
He meant what he said. It was nice kissing you. As in, he liked it.
It means he is smitten with you, he really likes you and it is nice to know that. You must be a really good girlfriend. Keep it up.