My EX is SO clingy? 😐

My ex and I dated for 1 year during our senior year of high school, he kissed a girl in a club, and then we broke up. The breakup really messed me up, as he was my first real "love" and it took me about a year to recover from the depression. We have worked things out and have been "friends" for about 2 years now since the breakup.

I have completely moved on, and am now in a happy relationship with someone else. I am in college and working a lot. He is not in school, he works full time at 7/11, and he gets SO UPSET when I don't text him for 3 days. He gets really mad at me and guilt trips me with the "you don't care about me" trick. He knows I'm in a relationship and that I only see him as a friend, yet I feel he is really clingy all the time. And yes, my current boyfriend is aware of the situation and thinks I can handle it myself.

What are your opinions ladies? What would you do in this situation?