Help me with this girl on facebook?

[Willy]

I deleted her a year ago because she was being a douche to me while i was like really depressed and I couldn't handle anymore negative stuff. Me and her have a mutual friendship with this other girl. I commented on her status and the girl I deleted liked my comment. She had never done that before, and like I wanted to test something out. I wrote on my friends wall and the girl I deleted liked it again. So I'm thinking what if she wants me to add her again. She was a really good friend before she started being a dick to me.
Do you think I should be her friend again?
Should I tell her I love her too?
I've started to miss her months ago, and now I see her liking my comments I'm getting curious