Trouble with girls

So ive been trying to reboot ever since I got dumped in November for being too needy. Im 17. I had PIED with my gf who was so hot and it sucked. Now I'm on day 9 of no PMO (longest streak yet, determined to keep it going), experiencing a flatline. Not to sound arrogant but I am good looking and some what good with girls. Lately ive been flirting alot with a girl from my old school and the other night we were at a small party together and she was all over me. I feel like a pussy because I didnt make a move because I was nervous I wouldnt get a boner. She's not the kind of girl to just have sex like that, but I was worried that hooking up might lead to a bj, where I would likely embarrass myself. Should I try to just kiss her? Also my ex girlfriend has told my friends that she misses me. I planned to wait a month of no PMO before contacting her, but I realized that she's not gonna wait around for me forever. Last night I contacted her and we flirted a little bit over text. I asked her if she wanted to hang out and she said definetly. She wanted to hang today because she didnt have school, but I couldnt becasue I did. I told her that we could figure it out later this week. If we do still like eachother, I want to tell her that I have figured out what my problem is. While we were dating I could never cum from sex or head no matter what, and often (it got worse as time passed) lost errections quickly, but we both didnt know what was causing it. A couple times I couldnt even get hard for sex. I was watching porn and jerking off while we were dating. So if we are flirting and start kissing or something, I dont want it to go farther yet because of my problem. I want to show her that Ive changed (fixed my problem). Im in a tough place because I had to text her soon because shes hot and one day someone else will get her if I dont, so I couldnt really wait any longer to fix my PIED. I feel like If I told her about my problem, she might just think that she needs to find another guy without this. What if she just wants to hookup? On the other hand if we still have a real emotional connection, maybe in a perfect world she would be with me while I fixed my problem. Or maybe I could just avoid talking to her about it and tell her I want to take things slowly. Sorry to write so much, please respond and share your thoughts.

 

I dont look pathetic at all she dumped me (I broke up with her basically because she was too nice to say it to me) and I didnt reach out to her for 3 months. We broke up on good terms and nothing hurtfull was said. It was my first girlfriend and I thought being as nice and loving as possible would make her happy. Obviously I was wrong because you cant be too nice of a guy. She told my me that she missed me and I didnt reply. She was the last one to reach out to me, and I ended that conversation too, and since the break up I have turned things around (she no longer has the upper hand). And I dont really care how hot she is, I only said that to mean that she turned me on and I should have been able to have sex with her. Its the connection we had that I value. Also buying more time is just giving other guys time to have a chance with her. No girl is gonna wait around for someone forever. I definetly have alot to learn though. To be honest somedays I think I want her back and others I dont.

 

Im working on myself but the reason im worried that she will get another guy is because I dont go to school with her and I never see her because I ignore her. Ive said this 5 times but I only said she's "so hot" to show that I was turned on by her and should have been able to bang her had i not had pied. She was my best friend when we dated and from the day that I met her we had the strongest emotional connection I have ever shared with someone