Plz help I have no idea what 2 do

Sa

So basically me and my ex split about a month- an month and a half ago. He broke up with me and got over it pretty quickly. I still kinda Haven't. We still talk on snapchat and he said he wanted to be friends and I do to but the problem is He went to is getting with a bunch of different girls and that and that hurts and every time I look at his face I feel worthless and ugly and horrible but I can't bring myself to block him on snapchat. So basically one half of me wants to but the other cant. I don't know what to do. My friends say block him but I can't bring myself to do it. Like I'm scared of doing it even tho we aren't together loosing the contacts scares me