TLDR: All confidence with girls ruined due to a bad experience, any tips to overcome it?

Up to last year I was doing pretty well with girls my age (now 18), letting things develop naturally at school & being able to approach them at parties. Basically was reaping the rewards without having to put too much thought in.

However late last year things took a turn and I haven't been able to recover since. I was texting a girl I knew well, she recently split with her boyfriend so I moved in knowing full well I could just be a rebound (was completely cool with that).

Long story short it was pretty intimate over text, getting a lot of pictures & things were good in person. However, whenever I tried to arrange a meet up she blew me off with huge lies about being busy (I recognised this so didn't ask more than twice).

Turns out the whole time she was bitching about me to her friends, completely fabricating how I was the only one putting effort in & constantly asking to meet up. Ruined me pretty hard, considering I knew everyone in her circle well.

This pretty much ruined all confidence I had with females, haven't texted one in a year never mind asking for their number. I'm tired of being a hermit crab now and am trying to revert back.