you seem to have a lot of insight in to what is going on. you see that you are depressed, he is abusive and you are seeking validation outside the relationship because you cant get your needs met from the relationship. He is using the classic tactics of an abuser. Being alone is better than that. Your self esteem is more important. you have the support of your friend, you obviously can attract other men if you are attracting them on dating sites. Right now it is best that you discover who you are, for you and your baby.