should I??

Okay so my ex who I lost my virginity to and who I loved deeply messaged me and asked if I was talking to anyone. His parents are going to be out of town this next coming week and he wants me over so we can mess around again. He's the only one I've ever had sex with and I want to do it again with him/again soon cause I'm horny asf lol. It's been over a year since I've seen him but we talk every so often as friends to catch up on things.  I want to say I am completely over him but then again he was my first love and my first so I'm not really sure if anyone ever really gets over their first love. I'm scared to do it with him cause I don't want feelings to get attached again but I've been horny. I have the opportunity to do it with other guys but I just feel I'll be most comfortable and it will be more fun with him. Is doing it again a good idea or a very bad one??