Advice?

Re

My boyfriend broke up with me a couple of months ago and I still really like him, everytime I him with his new girlfriend I get really jealous and I start to tear up. I try to block him on all social medias but I just can't get myself to push the block button. We've also been going out for 2 years and what makes their situation even more worse is that his new girlfriend is my best friend and we are all in the same class. Does anyone have any good advice on how I can get over him?