She left me and I can't go on anymore.

Man do whatever serves you right

"We made out that night" 😅 man if she was already dating someone how could she agree. I feel pity for you. If your GMAT prep was just because of her its time to reaccess else keep preparing

You deserve better. She is not a good person.

Bro, She will never be yours. I was in a similar stage as you and trust me the more you cling to her the more it hurts. Stop pursuing her and you can see that she was never in to you. It might take some time but you will eventually move on. Time heals everything.

I'm sharing a personal note that I wrote to myself when I was in that stage. Hope this helps.

"Seems like I should completely forget about the idea of us together. I'm trying this for long time but I don't know. I feel like I should stop thinking about her then I will meet her again/ talk to her and the whole cycle repeats. The reason why I'm saying all this bull shit is that the love that I have for ***** is not equal to the one she has for me. she is just not that into me. There could be multiple reasons for this and only she can give the right reason for this. Time and again she conveys this one way or the other and I know this but whenever I meet her, talked to her or when her birthday came up.... Stupid feelings take priority and will occupy my mind. I should put an end to this."