Better to DO than not. I am growing old and have lived a lifetime with anxiety etal, and going to a new place is a great adventure---you will still struggle, remember living with someone didn't take the anxiety away----I think, being in school, you will be busy enough, and meeting enough people to give you room to grow----
I was married 20yrs, divorced nearly as long now, and am alone.
Things to do,,,,way back in college I took a lot of showers, warmth, immersion, the sound of water, and walks, long walks. I still walk, like to go about with a camera, and I knit something simple, or come here, ---stretching is good, self-soothing things, making a big deal of preparing a cup of hot tea or coffee and some toast,
the purr of the cat------Supanova has the right ideas---mindfulness, etc---and you may find others to do it with-- Do get out there and go for it. You won't regret it. And you can take PC folks with you always. Big hugs.