My ex followed me about two months ago (on his finsta) and I followed him back. He never liked any of my pictures but would always see my Instagram stories and I don't really post much. We broke up almost two years ago, and it was pretty messy. I don't have on anything else other than Facebook. Anyways, he unfollowed and I was curious as to why he would follow me and then unfollow me.
So my friend told me he has a girlfriend and she actually felt uncomfortable with him following me, so that answers my question. Thanks for the answers (most of you guys were right).