Crazy huge dude

Ok, my ex girlfriend is going out with this crazy-ingly huge muscled dude and he wants to kick my ass and I am puny and scared. So I need to know where and how I can get a knife that is small and how I can carry it around my body at all times as to use it in case of defense (and defense only!).

I'm seriously scared and hope you guys can tell me how I can do this?

The muscle man has the brute and strength to kick your ass, but you have the brains to defeat him with pre-arranged tactics and careful planning.

First get out a map of the area where you will most likely encounter your enemy. Then look for safe havens, hiding places and escape routes. 

i suggest using pepper spray for counter attacks, when you spray him he will be vulnerable, you can either choose to kick him in his weak point, or run like hell.