Is it normal to just randomly cry?

Last night, I was talking to my friends Paige and her boyfriend, Jorge, Heather and Asia, and I just felt like I was suffocating. I felt terrible, like I couldn’t breathe, and my eyes started to burn because I started crying. I’ve been upset over a lot of things having to do with these guys (one of them which I like) and the other asking me questions about relationshippy things. Is it normal to just start bawling? I was talking to my crush, Daemon on Facebook and he helped me feel better but I also bawled more because I felt like a snobby little prick since I was being so negative around him. I didn’t sleep last night, and my eyes are really puffy and are burning still. Is it normal to break down for hours on end? I’m not sure how I should deal with this..