my girlfriend wont have sex with me?

just get more physical next time you make out. If she gets into it, keep going until she hesitates. If not, talk about and it's not that akward.

Whoa, she's probably put off by you needing it so much. Just relax and focus on developing the relationship with her, put sex on the back burner for now. Do NOT talk to your ex any more, or you'll lose your present girlfriend. She is probably rightly worried that you don't care for her (especially since you left her before) but just want sex, all the evidence in your track record is that you use and lose girls. You need to let things develop slowly, at her pace, not yours - and talk about this stuff too, so she knows where you are. When you know if the relationship is "the" one or not you can suggest having sex, or even better propose as that'll put her mind at rest that you're serious - or if you can't wait that long and don't care for her that way, then you should dump her and move to an easier girl, as that will be fairer to her in the long run.

All I can say is that you should take it one step at a time. Talk to her, find out what makes it awkward for her everytime youz try? Or just take it easy and just let it come whenever? :)

This probably wasn't much of a help but I hope you got an idea out of it :)xx Good luck <3

Sounds like sex is really important in a relationship to you and not at all to her. Talk to her and explain it's something you need. If she doesn't understand, it may be a sign it's not going to work.