Dont know what to do! I need advice!?

I've dated my husband for 4 years and we've been married for 2 years.I met him when I was still a teen and very unexperienced.We're 7 years apart! He's been there for me for the most part.He motivated me and even helped me pay for my college education....took me on nice vacations.I was his world! But then he changed a bit and started going clubbing and hanging out with friends.My days were so lonely!! He has put me through so much that now I dont have feelings for him.Im no longer attracted to him.I see him more like a brother than anything.I wouldnt even care if I found out he had with another woman! I never felt this way about him.I was always getting jelous or freaking out when I didnt hear from him! I want to start a new life.We have a son together and I know its best if we stay together but I dont see myself with him anymore.Plus im not on good terms with his family.I'll never feel normal and comfortable around them.But then again,I dont know if I'll meet a great guy! They're scarce! I know that after finishing my degree,I'd like to move with our son and see what life as to offer.We're still living at my parents' house.My depressed days are over but im still not happy with life.I feel like there's a new life waiting for me!!I need advice.Thanks!!