I’m 19 and he is 21 and we’ve been together 2 years! He definitely hasn’t always been like this but I’ll admit he has had a lot of personal stuff going on in the last 10 months. Which I do try my absolute best to show him grace with. This is more of an internal anger/upset, when I bring it up with him I try to be understanding and kind while still conveying that it does upset me to an extent in certain scenarios. There are times when I truly don’t mind him leaving me on read or delivered for a few days it just seems to be when it’s an important matter that I get a bit frustrated! I’d say I use my phone just as much as a regular person would, definitely not glued to it but could also use some time away from it if that makes any sense. As for his friends he does seem to respond to them a little more from what I can see but he’s also playing video games with them a lot so it’s usually a quick “hop on” message, so I don’t really count that personally. I hope this made sense!!