Can you give Ex-Bestfriend advice?

Lovejit
This is a long story.. I'll try to shorten it for your convenience. 
Me and my bestfriend knew each other for 3 years. We were really close from the beginning. She's lesbian.. I'm straight. At one point she told me she was in love with me. & at another point I was confused on how I felt about her, only to find out I was trying to hard to please her. (This is just some background) She was super... Not timid. But she didn't really hold her own.
Over the years I feel my attitude rubbed off on her and she got more thick skinned and a very sturdy back bone. We recently graduated. A couple months before graduation we stopped talking to this girl we were both friends with. I stopped talking to her because my bestfriend fought with her and because of that I had her back. I said some stuff to her too, so I didn't mind not talking to her.  So this was a couple months before graduation, right? All the while we talked crap (I know, I know, horrible.) 
She told me a couple weeks ago that she started talking to that girl again.. I totally blew up, I feel like that's sort of 2 faced. How do you go and talk to that girl after saying so much about her? What bothered me was that she didn't even tell me she started talking to her again. She just nonchalantly brought it up. Like it wouldn't even phase me. My bestfriend and I started losing touch about a month before graduation. 
After this argument.. She blocked me on everything. Literally everything. I'm so hurt and angry at the same time. I miss her and I hate her at the same time. How could she throw away 3 years like that? I have a ton of pictures of us and key chains and just memorabilia. 
I wanna send her.. Her set of pictures.. Should I? Please help me. I really don't know what to do. Should I even message her? It'll make me look weak if I try to contact her, huh?