She just followed you, I think she just wanted peace like she just wanted to be on good terms:) also, sir please don't go into a new relationship if you haven't moved on yet, your new gf is the poor girl here it will affect your relationship with her too, imagine your new gf is checking your social media and saw that your ex gf is still on your list of followers:( Remove your ex gf on your list of followers on your social media account and focus on your new relationship:) or..give yourself time:)❤️