we could play analysis for dummys all day..but its better to conclude this now and either continue happy or eject from this before you get hurt too much

I would arrange for her to come round.

Sit her down and get everything out in the open

Say in hindsight ive acted like a bit of a tit, getting jeleous etc and thats because ive got feelings for you and it scares me a bit.
also say shes blown hot and cold which leaves you confused.

So lets just chalk it down to both liking each other and being muppets and move forward and forget about it but make sure it doesnt happen again.

Give her a hug and a kiss and talk about somthing else--dont spend all night going over it in detail assigning blame.

So now its down to you to not act like a needy chode and down to her to stop playing your emotions.

If you hit the same problems later on then you know its time to Eject