I need help :( broken heart!!?

Don't change yourself to make him happy because you won't be happy with who you are. Guys like that love decent women those are the ones they will end up marrying. I have the same problem being a decent women myself. I always seem to attract those type of guys. They will date a party girl but deep down they really want someone decent who they can take home to mom. You can't change him that's who he is and if you're not comfortable with him, leave. That's what I would do. If you stay he thinks that you've accepted his behavior and he probably will never change.