I made a mistake

I had a friend 2 years ago, I was upset with her about something and I stopped talking to her. I removed her from Instagram. But now that I think about it, I think I was unfair to her. Should I send a follow request again? Would this be wrong? Or am I worrying unnecessarily? Should I continue on my way? I don't know, this issue has been on my mind lately and I feel bad. I feel remorse. I shouldn't have left her out of my life just like that. At least I could talk to her. She helped me many times. I helped her too, but it doesn't matter because in the end I was dishonorable. Anyway, I'm hesitant to send her a follow request again because I don't know what has changed in her life in 2 years. Maybe she has forgotten me completely