Can't contact the girl who chose someone else over me.

Work on yourself mate. None of us can look to anyone else to complete us. If that is the case check out religion. Despite people messing it up left right and center there is truths to be found there.
Last thing you want is to enter a relationship where you are dependent on your partner. A good relationship in my opinion is about offering value to eachother. Bringing eachother up! Not sucking value time and energy from eachother.
Check out ChaseAmante/RSD. Keep an openmind and be the best version of yourself you can be.
Spread good emotions. "As ye sow, so shall ye reap". Do unto others as you would they do unto you.
Life is a challenging journy. There are alot of opportunities. And people change. Some for better some for worse. Most not at all. But we all have a choice.
Best of luck

If she has chosen another one over you n cut all contact meaning she has gotten over you.I left my ex years ago after giving him many chances over something.He called me many times to talk,giving excuse to see me on my birthday saying he has ordered bracelet or necklace for me n insisted to pass it to me,sending dinner over to me,etc and even threatened to hire someone to beat up whoever dating me at that time lol..but once the love gone is gone.I still cared for him of course as we were living with his family for years just like a big family but I want nothing to do with him after that.He has hurt me too deep.

Sheesh don't do that, you need to move on dude

That's incredibly messed up and fucking pathetic 🙄