I am 28 and feeling alone already...?

Honey, this is called abuse, here in the U.S.A. No one has the right to treat you that way, and you are not a slut for leaving and moving on. I've been there, done that. I left and found out that marriage isn't supposed to be like that. Your husband is an asshole. If you're in North America, I'm sure there are organizations to help you.