Ok, maybe think of it this way: There's currently a blockage between you and your husband, but you don't know what that blockage is. Sounds as if you're both scared of losing eachother. Interestingly, you wrote him a letter and he sent you a text. Face-to-face seems to be hard at the moment, so maybe don't expect too much from it ...
A long time ago (20 years or something) me and my husband were going through a rough patch. We were working all hours, still with not much to show. One weekend, while the kids were away, I packed my stuff and was ready to leave. I phoned his parents to say that was what was going on. His dad turned up at my door about 10 minutes later with a bottle of vodka. We sat there all afternoon going round the houses, with me talking through my problems. And I've never forgotten the advice he gave me: 'There are no solutions, only resolutions'. Nothing comes quick, everything takes time, you can plan something to move forwards, but that might get knocked off track, etc. In other words, problems don't get solved, they get worked through, and that can mean pain, regret and a bunch of other stuff. You come out the other end stronger, together and individually ... Issues can be opportunities for growth. So I'd ask yourself how you'd like to grow with your husband ...