Crazy psycho ex-girlfriend?

Okay, bear with me here... I'm so stressed...

My ex started liking me after not seeing each other for about 3 months over the summer. So started liking me again for some odd reason, and has been trying to get my attention in every way possible. I don't...

know why because I've told her about 4-5 times I don't like her and to leave it be. But she keeps changing it in her head like oh he doesn't mean it! so she thinks I like her when I dont obviously. But I found out that a senior likes me (I'm a sophomore) and I like her too, but we aren't going out. We just want to get to know each other, but my ex asked one of my friend what's going on between me and this girl. She told my friend she was jealous and has been depressed for a while... So in spanish she wrote me a note saying she was sorry for everything she has done in the past (long story) and she was hapy that I found someone else. She told me she liked someone else, so yeah I was like that's fascinating because I really don't care but she wants me to obviously... So me and the senior girl want to go on a date saturday, but it's the day of my ex's b-day party, we invited everyone that was going to her party but we totally forgot about her party. So she's all mad and is forcing everyone to go to her party. My ex never talks to the senior girl, like NEVER, and just out of the blue invites her to her party and she doesn't even know her... Which pisses me off because she's trying to butt in on what's going on between me and the senior girl and is trying to do something but I don't know what it is...

What should I do? Give her a talk or leave it alone or what???

You made the mistake of being rude in your response to the note. You should have just nodded and let it be. But now she is out for revenge. I think you should go to her party, and show her that you have moved on. Be polite. Because a date can be rescedualed.

You can't help who loves you the most cruel thing a boy can do to a girl is let her fall in love with him and don't intend to catch her fall I think you and her should have waited until feelings was gone now yall want to hurt each other.