 I'm a 20/F and the other day I went to a party and this boy I liked was flirting with me, I knew that if I went with him alone he would try to kiss me and I panicked, my heart was beating super fast and I was extremely nervous, so basically I nicely refused to go on a walk with him. I regret that SO much, but at that moment I just shut down. Since then I have been uneasy and anxious I'm not sure why, I just feel bad that I couldn't pull myself together, I have never kissed anybody because any time there might be an opportunity I just sabotage it. I also lowkey feel ashamed of being this old and still haven't had my first kiss.

What should I do to improve my anxiousness:((