I don't know what to do anymore

Me and my boyfriend relationship when we first started 4 years ago was great I never loved a man more then I loved him but over the years he has changed for the worse and I do not like it. We use to be all cuddles and holding hands and warm hugs and kisses but not we never do anything like that. Only time we kiss is when we give a kiss goodnight, a little peck. He has become really possessive and I can not do anything but go to school and come home. I cannot even go to my parents house, he tells me no. A man should never control you and I'm beginning to not like this relationship at all.... what do you all think?