Should i give up trying to make ammends?

Ive known this chick for a while since school. we were pretty good freinds and she was my main support when i was going through depression she was great to talk to a great guidance and all up just someone you'd wanna spend the rest of your life with.but 1 1/2 years ago we had a falling out the pressure became to much to keep looking after me and now she won't even speak to me i feel like i've done something wrong but i don't know what and i so desperatly want to re-connect with her for old times sake should igive up on her or keep at it and reek havok?