So much is right where you are. I would focus on the one thing that’s not and fixing it rather than upsetting the whole apple cart. You could transfer and have a hard time breaking in socially. Of course, if there are other reasons to transfer, it could make sense.
Living off campus requires more work to make things happen. You did a good job when you were in the company of folks in the dorm, so I might focus on opportunities that create that environment. Theme/interest housing, Greek life, volunteer opportunities, etc – anything that puts you in regular contact with the same people. You may need to be the instigator of activities with people you meet – a meal, study group, attending a game or campus event. This is a big change for a lot of people.
And while it’s a different avenue, you might want to look at study abroad programs. Fun way to meet new people.
I feel for you. College is presented as something it is not for many. Give yourself some grace when comparing your expectations to reality – sometimes reality is not so bad, just not what you were expecting.