Are you just 18 or 19 or are you an older first year student?
Not trying to jinx anything, but what happens if living together isn’t as good as you thought it would be? What happens if the two of you break up? Can you afford the new school if you end up having to pay rent? Would you still be happy at the new college if he weren’t in the picture?
I would say, stick it out at your current school. If you don’t like your future living situation, there’s lots of time to change it.
However if you do decide to transfer, do it independently and make sure you’ve really thought about the “what ifs” (financial and otherwise).