You are only 23 and you were very young when you met this young man and he began to control you more and more. It would be better for you to break away, even though that is hard right now, you can "learn" how to be your own person gradually and we all learn by "doing", so for a while you will be uncomfortable as it is normal to be uncomfortable with "change".

If he looks at and flirts with other women, wants to change how you dress, that is about "his" needs and wants not yours, he is young too and the last thing you want is a young imature person to tell you who or what to be, that is something YOU decide for yourself and that is something we slowly develop in ourselves over time and it's very rare to know "self" at only 23 because one has not experienced enough "life" yet at that age.

Drop him and even though it's a challenge keep going to college and get an education and find YOU and be on your own so you can decide what "you" want out of life. You are too young to get caught up in a life relationship as you have not figured out who "you" are yet.