Ex boyfriend

jasmine fann
I have this ex and he still try's to flirt with me and everything. I try to ignore and everything but I can't. He stalks me on everything I have. He text me, like my Instagram pictures, inbox me on Facebook and etc. like how in the world do I get rid of him?? And what makes it so bad is that he is the one that broke up with me because I never really wanted to kiss him. I know that sounds weird but We are both 13 and I want my life to be perfect. So what do I do? And is he trying to move his way back on me or??? Please tell me