Tell me what this mean?

So this guy I lost my virginity to we fell out and everything he unfollow me ghosted me etc and I was subbing on my instagram story about him and I guess his friends told him what I posted, anyways fast forward my bestfriend saw him and ask him if he knew who I was and he literally got scared and asked if I was with the group with his friends and then he called me crazy I’m so confused because I haven’t done anything to him yet
Tell me what this mean?
Post Opinion