Should I add her back?

My ex and I broke up around 5 years ago, we stayed in touch after and she kept being close to me but then a year after the break up I seen her with someone else and confronted her at which point she said she moved on, this broke my heart so I stopped speaking to her although I didn’t delete her off my social media. Another year after that we slowly started to speak again, then I worked out that the other guy cheated on her, we stayed in touch and she started to get close to me again and even apologised for the way she left, I asked her if there’s any hope for us but she said no, I was really confused cos I didn’t know why she was being close to me, so at that point I told her I can’t handle this anymore and that we need to lose contact so I can move on, we wished each other the best and I deleted her off all my social media and that was when we lost touch around 2 years ago. I’ve never moved on since her and I hadn’t heard from her since then, but a few weeks ago she started following me on Social media, I followed her back but she didnt message me or anything although I could see that she has been active, so 3 days later I deleted her but kinda regret it after. A part of me wants to add her back but I have my doubts because I don’t want her to break my heart again but at the same time I still miss her, I’m so confused. I’m not sure if she feels anything. Did I do the right thing or should I add her back?

Have you improved yourself in regards to the reasons that ended your last relationship?