what did you do to forget someone who you loved?

i tried the following but still cant:

1. attend weekend workshops
2. engage into sports after work
3. went for solo trips
4. stop communicating with her
5. eat healthy, wake up early, sleep early

Usual shit la

Don’t see a future with me and she lost feelings ( we were 21 year old that time) and need to move on basically telling me she found someone better lah.

She broke up with me on my 21st birthday ( some say this is the freedom birthday from parent clutches) and I was informed. That night I suppose to cut birthday cake with her but end up cut cake with my parent instead lol

Anyway she will remember me forever coz I was the one that took her virginity. But yeah that breakup made me feel shit and weak