10 best ways to teach a paly bo the ultimate lesson of his life.?

I'v recently discovered my bf(21yr old) is cheating on me(19yr old). N he's been playing around durty games with girls since he's teens. He isnt aware dat i got 2no da story. I realy wana teach him an ultimate lesson of his life. So dat no other girl has 2go throug wat i am going through. Precisely i can let dis **** go on repeate his **** some1 has 2stop him or els it would turn in2 a neva ending story. Please empathise n give sugestions or els dont waste ur valuable energy. This quiz isnt 4u.