I've been single since January then met this amazing girl in June. We've been dating and seeing each other a couple of times a week since then and everythings going well. However, when I'm not with her my anxiety and lonliness has increased ten fold. I struggle to enjoy activities I did before. 

For example, a typical weekend for me before would be seeing friends at the gym then literally enjoying my own company watching sports, playing my guitar and playing games. Now though I just don't seem to enjoy anything and I just feel really anxious, lonely and down... I can't quite describe it.

The frustrating thing is this girl is amazing and I'm literally on cloud 9 when I'm with her.

Any advice to  get over this without ending it with her obviously haha