Breakup

Theres a girl that i really loved

We made plans and everything

I did everything with her she did everything with me

I talked to her about everything

But just out of a sudden her response becomes dry and i suggested to take a break and maybe we could come out stronger after the break

But she told me i should just break up with her

And she broke up with me and ghosted me since

She just discard me everything my efforts all the things ive done is like nothing to her

We were invited to a christmas party yesterday and she was laughing and hanging around as if nothing happened and like she never dated me while i was crying outside the party

And then we went to a club later with a group of friends and i saw a guy was holding her hand and grabbing her around in the club but i figure its probably platonic as the guy is touchy to everyone but it still hurts so much

She helped me so much when i was at my lowest point. Its hurting so bad now i dont know what to do my friends told me not to text her but all I hear is "let her go" "move on" "she doesn't deserve you" "you need to let go". You don't understand..how she made me feel. I felt like the lightest thing in the world. When I was with her all my problems disappeared. I was happy. I couldn't stop smiling when I looked at her. I couldn't stop looking in her eyes when she looked at me. I just need a way out of my head and stop thinking about her and move on but i dont know what to do. Please help me