Is there any way I can fix this??

I'll try to explain this as briefly as possible.

In May there was this woman that I was interested in. She was also interested in me, but she also just got out of a 4 year relationship. She found me physically attractive and I was scared I was being used as a rebound. But we talked a lot and hung out, and I really started to get feelings for her. One night I took her home but got performance anxiety. I felt something for her and I really liked her... but I was scared I was just a rebound so I got somewhat emotional and just couldn't get turned on (it happens). She got really upset. She left my house at 4am then started to ignore all my texts and phone calls. She moved away at the end of may and continued to ignore me. I explained to her exactly what happened, but she continued to ignore me. I just got upset and gave up.

She got in touch with me on Monday of last week. She is coming back for a music festival and just texted me saying hi, asking how I'm doing. Honestly I got upset with her and told her I wasn't interested in games. I also told her that I heard her ex was trying to get with her (which I heard from a very reliable source) and that I wasn't interested in that drama. I felt like it was justified at the time since she ignored so abruptly like that. I suppose it threw me off that she actually contacted me again, I was convinced she had an agenda.

Since then I apologized to her. I explained to her how I'm going through alot (which I am) and that my perceptions may not have matched reality. I further told her how happy I am for her. She has since ignored me.

Well I found out yesterday that I am camping with her this weekend. We share many of the same friends. Not only are we sharing the same base camp, it appears as though the three girls she is travelling with are scoping me out a site. So her and I will be in very close proximity to one another.

Is there any way I can smooth things over and make it up to her? I really like this girl. She hasn't responded to me, and I don't want to come across as a pest. Or is this just a lost cause?