Girl Trouble - Am I Bad?

When I was doing my masters in economics last year, I met a girl. I was instantly attracted to her, however never got a chance to ask her out. Eventually I did, and we went out a couple of times. I really liked her but I think she considered me a good friend. I got mixed messages from her. Once, she sends me text messages in the middle of the night asking me to take her to lunch tomorrow and another she doesn't reply back to me. Anyway I persisted but eventually she kinda distanced herself from the relationship after we hooked up. I had fallen for her but she wanted no part of anything. Didn't return my calls or texts, or when she did made up excuses to avoid hanging out.

So I told her how I felt. She was angry at me for ruining our friendship even though we hooked up, which she instigated. I never saw her again for the 3 months( she went to Delhi for some work) but she called me occasionally if she needed to talk or something.

So she left and we remained in touch via Whatsapp. On one occasion, I made a passing joke as to how she spent time with every dude there but me. She became very offended and we stopped communication. She started it up again but didn't apologise.

Finally, I actually visited Delhi because another friend of mine was getting married and invited me. I didn't visit her because of time constraints and she became pissed, and wouldn't talk to me, accusing me of doing it on purpose. That was 6 months ago.

I'm going to a friends birthday soon and she's gonna be there.

Would it be bad for me to hold the grudge? Or should I just let it go.

Bear in mind, she avoided me whilst hanging out with others and then accuses me of avoiding her. I don't wanna be a douche but I don't wanna be a pushover, someone who can call me whenever and I'll come running.

Please help Grapevine! 🙏🏻