should I do it with my ex I’m so confused

So I was seeing me ex for about a year and a half and I feel in love with him during that time as far as I know he did and was all sex to him some small part of me thinks this wasn’t true for that whole time but was to the end anyway. We officially end the seeing each other and just each other 2 and half year ago now but we seen each other few times since first was 2 New Years ago I accidentally booty called him This was about 6 moths with out talking and then we didn’t talk for ages again I always say he my weakness I know he bad for me but I can’t say no to him cause I get on with him so well as a person to and he get Tom boy side of my which I don’t really bring out unless u always known me and I’m more girly but comfy to most people u don’t get my knowing cars and trucks anyway after about 6 months again a my brother had accident and was in hospital and I was at work then home then hospital then back home then woek again and I want some me attention so I messaged him and we started seeing each other again but this time we were on same page that it was just fun but that kinda died down and we stop talking and I moved on and Been seeing this amazing guy and he treats me like I should be treated which ex never did but my ex messaged me today and I’m so tempted to go see him but I know I shouldn’t idk and we both know if we see each other we end up sleeping together