this was from the dude with the disgusting valentines card yeah?
First up, I'm sorry.
Second of all, and again sorry if this sounds rough, but I am CERTAIN you're gonna look back on this relationship and be glad its over. Probably not today or tomorrow, but that day is coming. Take a deep breath in and out, cause you're free of that asshole.
I'm sorry for the pain he has caused you, but the trash took itself out. Block them back, just in case they get drunk and weird, and leave them in the past.
Ah man. I remember how giddy and excited you were when first meeting the guy. But it sounds like it's all for the best now (what a dropkick breaking up with you via text). And you're very much ready to move on yourself.
You're better off without the guy, and I think this experience will be a great one to take note of what worked + what didn't. Pay attention to what you felt you needed from him (that kept you in the relationship) and try to find other sources for that, or interrogate the quality of what you were getting, so as to avoid going back to him in a moment of loneliness and/or inebriation ;)
He was no prize though. He was noncommittal, self centred, low effort, and consistently treated you like an option. I agree with the advice to block him everywhere in case he comes back sniffing around again. It will also stop you lurking his page and picking at wounds.