If I could summarize 95% of the problems here that I've seen on TRP, it would be "You cared too much".
We live in a world that thrives off of over-concern. Everything is an emergency. All the news is late breaking. Everything is once in a lifetime. Life-changing. Urgent.
Some things do deserve attention. Most of it doesn't. What harms us the most is that society programs us to care too much about interpersonal relationships. Think about all the TV shows that are popular. Some character's relationship with another character will make or break everything. Some reality TV person hooked up with someone else and that's a BIG deal.
We get fed the same shit via gossip all day long too. This celebrity fucked this celebrity. OMG!
My point is this: When all you see is people making a gigantic deal about everything all the time, it's easy for you to adopt the same philosophy in your own life.
Stop for a second.
So what if she never texts you again? Yeah, she was cool but oh well. She broke up with you? Sure, you'll miss her but you'll live.
If you want to reach the next level in life then you have to stop trying to find the cheat codes to life to manipulate your happy ending. The first step towards happiness, overcoming grief, etc., is ACCEPTANCE. Don't confuse what I'm saying for complacency. Always strive for the best, but accept what things are in your life at the present moment and be a MAN about it. Stop trying to run from the negative outcome all the time. People run away from negative shit their entire lives and wonder why they've never developed the skill to cope with it when that negative thing INEVITABLY happens.
This is 100000x more true when it comes to women when you're a single man. There are no cheat codes to women and there is no perfect formula to get them all to fuck you. Start coming to peace with this. You'll notice that it won't mean shit after awhile. Instead of being scared of her leaving, embrace that decision if that's what it comes down to. As much as it hurts, it'll numb you to it.
You have to start developing the strength to detach from people and situations. At first it sucks, but eventually you'll get good at it. People will recognize you're good at it and respect it.
Start cutting out the bullshit. Becky's sending mixed signals? Just cut contact. Move on. Sally's out there waiting for you probably. Sally acts up? Susie will be right around the corner.
She wasn't "perfect" for you. You guys clicked a little bit, you got excited and then elevated her to some demigod status and got obsessed. Stop doing that. Every woman is JUST a woman. If you find yourself having to "figure out" a situation, then just bail. It's not supposed to be hard or complex. If you talk to her and you guys connect, good. Go with the flow. If not? "Have a nice day. Bye." Life isn't the movies. You're not going to be that goofy guy who runs into the girl he likes and she hates him at first but then over time becomes endeared with his antics/heroics and falls madly in love. That NEVER happens.
Follow this advice and watch your amount of "beta" moments rapidly decrease to almost nil.