did I make a mistake?

But the last year has been really hard on us. He started back at school and it really has taken over his life which is understandable, however in turn it has created some distance between us and I began spending more time with my friends on the weekends. Before this year we really were a chill inside the house and smoke weed and watch movies kind of couple but I began to really enjoy being out and about when I have the time but he didn't really make the effort to do that with me- it's not his "thing" I also quit smoking weed and my interests have just changed as a person since then...18-21 is a huge growing period in life I think 

In this year I have really grown apart from him and made new friends that he doesn't know etc. 

I've talked to him a few times about this distance I feel and it has gone unresolved. And the distance has grown further and further away...Last night I told him I needed space and moved out of our house and into my friends house- but something in me feels regretful like maybe I could've tried harder and gave up my "weekend life" for my relationship 

Can anyone relate to my situation? Being at different places in a relationship and working them out? Or should I give myself time to experience this stage in my life?? Like i really love and care about him but is also feel like it's too little too late. He says that he wants to really try and make it work but part of me has doubts about whether that is something that will actually happen.