1. Yes, she can still get attracted to you. If she friendzoned you, you need to show her that you have changed and now you are a much interesting person..
2. I haven't jerk off since the june 1st and the results im getting now are way better than before. This is due to the boost in confidence I got a long with it. But I know people who jerk off once a week and this still do great!
3. They care more about your hygiene! Even if you dressed really good and you smell bad this will be a turn off.. Make sure you smell good and your clean. Of course, if you dress up well that is good too.
4. Lead the conversation there.. Normally for me it comes up normally when I'm sitting solo with a girl. But here is a nice game you can play with her or the whole group. The game is called "Never have I ever.."
Simple and most of the statements would be about sex normally

Once you, her, or one of your friends mention sex everyone else would be talking about it.
Good luck