You want out of college? I want back in. I will trade you straight up.
Man, when I think college, I remember good friends, drinking in the afternoons, going to football games on the weekends, going out to bars Thursday through Sunday morning, playing video games until my eyeballs popped out of my head, going to the apartment swimming pool to see the ladies, weekend road trips to the beech/lake, strip clubs...fu#k, it was awesome.
There is so much for you to do right now and you NEED to take advantage of it. It seems like you are a pretty serious person and a focused student. My advice would be to let loose and make a few bad decisions. Not too bad, but fun bad. One day you will look back and see all the things you missed out on. Also, you say you have few meaningful friendships, but you seem like a good guy to me. I bet if you opened yourself up to the whole experience, you would gain more very quickly. Give people a chance and make the most of your time there. This is your life afterall, don't waste the present wishing you were in another phase of it.