Okay, a year ago me and my ex broke up.  We tried to be friends, but he just fell off the face of the earth and never talked to me again. I got over him and have been dating the most amazing guy for about 7 months now. Well 3 months into my boyfriend and my relationship, my ex begins to ask people how I've been, if me and my boyfriend were really together, things like that. I ended up confronting him about it and he lied saying he didn't do any of this. I let it go and moved forward with my life. About a week ago his brother begins to blow up my Instagram asking me a bunch of questions about my personal life and why him and j broke up, and calls my boyfriend by a nickname only people from high school called him, and made me suspicious on if my ex is using his brothers account to get in contact with me. How in the world do I handle this without it ending badly on anyone's end. My current boyfriend is completely aware of what has been going on. I just really need a second opinion about what to do.