Looking for validation outside yourself is a losing game it will hurt you, your relationship, and if you get into one it leads to codependency. Girls can tell when a guy wants a girlfriend and will say yes to anyone remotely pretty idk if you’re doing this but it’s worth mentioning. If you lay all your cards out there’s no build up, excitement, or anything she has to work for. Working out is great but I suggest working on yourself look into self help books. If you’re chasing you’re already looking in the wrong places. Play it cool let things happen naturally. Also yes some girls can be mean about height but not all… My boyfriend is 5’5 one inch taller than me and I never cared he’s funny and I find him attractive. If you can make a girl laugh and be nonchalant (don’t force things or try too hard) girls will be attracted to you. Notice most married comedians have beautiful wives even ones that aren’t super popular. If it makes you feel better 99% of people feel that way at that age it gets better trust me.