Should I do this or is it too awful?

So I have recently made a Facebook account I haven’t had one before to reconnect with old friends. Most of them haven’t seen or heard of me in years and I’m like a completely different person lost a lot of weight. A guy who I used to know added me saying ‘hey x’ with a winky face a kiss at the end BUTT when I was younger this guy used to make my life hell he used to call me fat every day throw food at me call me a pig even used to come in to my work just to harass me and would even wait for me to finish work and wait outside just to harass and abuse me yet now he wants to talk and be nice saying I’m beautiful and I have changed???

So im planning on pretending I like him make him fall in love with me then slowly start breaking up all of his relationships, ruining all his plans and making his life hell then once he is in love with me and thinks we’re going to be together I shall just leave his life forever without an explanation, so he is miserable and heart broken. Should I do it?? I know it sounds extreme but this guy made me suicidal and have an eating disorder and i had to quit my job because of him which left me unemployed for over a year due to the depression and now he wants to act as though he hasn’t done anything. I think he should pay for what he has done. Opinions. Also if you have any other evil ideas on how I can get him back I could like to hear them.