Nightmares of Abandonment

Breath. My husband is similar. He doesn't seek intimacy like I wish he would. Sometimes we run a bath and soak together. There we talk about anything and everything. So what I'm saying you two need a safe place to talk. If that's with each other or with a therapist.

Deep slow breathing, get that anxiety wrangled first. Make some easy friends through local social groups like town discords or nerd gatherings or church if you have one. Get a therapist if you don't have one, and talk to your partner. Tell him you would like him to hold you and tell you he loves you. And see if you can have better "sleep hygiene" to avoid nightmares, like not eating before bed. Good luck.

Have you talked to him about it?