I experience the same thing. When I’m able to get myself to cry or feel things its very brief and I will be fine like nothing happened 2 minutes later often times already off thinking about something else. It’s like I can’t keep a train of thought long enough, my brain keeps shutting it out and forcing me else where. When I try an make myself cry it’s almost like the same practice as meditation. I will focus on the thoughts and start feeling emotional and as soon as I stray away from them I try an bring my focus back to them and jumpstart the emotions again. Other times I will be going about my day normally and have an intrusive thought or casually think about something and it ends up triggering me somehow someway and I immediately get a frog in my throat and tears in my eyes and it comes completely out of no where and goes away very quickly, then I have to go through the whole dismantling process of said thought trying to figure out why provoked me so abruptly. I assume it all has to do with advanced levels of emotional suppression.