Is it normal to be disinterested in things after being rejected by a girl
So I have this feeling for a girl that could really only be described as love. Not lustful, I just feel happy to be around her, love to see her smile, and just want the best for her. I met her about a year to a year and a half ago and we had hung out a few times with mutual friends and got along well. This weekend me, her and a friend spent the week together, and I finally decided to ask her out. Turns out she isn't into men, so I was rejected but she still wants to be friends.
In the days after this, I have found myself completely disinterested in stuff that used to fascinate me. Even the fact that I'm starting a new job tomorrow seems meaningless. I used to love learning and building my career but I just don't care about it for some reason. Things feel really empty, and I just can't bring myself to care even though I want to. Some more possible relevant background, I'm 24 and I've never felt this way for any other girl I've ever met. I've never been sexually motivated to chase a girl. My only past relationships were when girls approached me. What I feel for her is something completely different from anything else I've yet experienced. So is it normal or am I just weird?