Should I see her or not?

basically, my mum is going over her mates house, and my ex girl friend is my mums mate daughter :S... and I dunno if I should go aswell, she is going quite late to her house... and I'm a early sleeper lol, and I train in boxing and Wishinkai karate :S, I ain't seen my ex in a while :S... I did say to her b4... We need to hang out sumtime but this is a chance :( but I know I will fall asleep :S lol... so I need advise basically, i wanna get up early 2morrow. Not sure wen my mum is going but I know she will come back late lol... I don't want to break my sleeping pattern... on Monday I got morning jog :S about 5:45am, I need my sleep lol