you're asking for help on an internet forum... slip is right, you're screwed.. get a rottweiler if he is mafia, you might wanna take a beating to save your life
i assume you arent a martial artist but hey. every boxer has the same weakness and thats grappling or ground fighting. (Im sorry to stereotype but boxing is a big thing at my school and ho pick up on these things) but i would normally say if you have to fight him kick him in the groin and sprint!!
Carry a pocket knife. Don't kick his shins, kick his knee cap and bust it. Don't ground fight in a street fight! Use your knees.
Hmm I think you are overestimating your opponent here... And why do people think that kicking his knee and kicking in general from afar will work against a boxer? Especially if you haven't had proper training! If I was to fight a boxer, I'd grab, and hold on to dear life! And then uchimata or osoto gari or course =P.
Perhaps he wants to fight you because in English class he saw that instead of using periods (.) to end your sentences you use elipses (...) Talk it over with him, he may forgive you.
If, in the future, you fail to use semi-colons to divide clauses of that nature, I'm coming round to your house to choke you out! What are your weaknesses, by the by?
Of course, you have to shout "Look over there! It's Don King!" first - and point in to the distance. That's their weakness. THEN hit them with the chair!