Ex sent friend request

My ex send me a friend request. I don't know what to make of it. After we broke up I stop talking to him because he couldn't handle a "friendship". He also kept trying to get back together by failed attempts to make me jealous. I haven't actually spoke to him in a good 8 years. He's with someone, and so am I. I have no interest in him what so ever. We did date for 3 years. I have no idea