Rambling about Ex

I found out recently that my ex' nan is sadly not going to be around longer and his mum asked if I wanted to go see her. My ex lives with her so I would be around her all the time and she is such a caring woman, but I don't want to go to his place and make it awkward yk? I haven't been with him for about a year now but I still feel like I'd go insane if I saw him, since I fall in luv pretty quickly so what if I fall in luv with him again? I was the one who broke up with him but if I catch feelings for him idk what I'd do. 

I tell my family I'd be fine seeing him again after the breakup, but it's all lies....

I honestly don't know if I should see her (which means I'd have to see him) or totally forget about it