was it your dad's car, or was it your car? and do you need his approval to get another car? i'm guessing you must be fairly young (i'm 50 and my son is now 20).
2 years ago, it was cold as hell out and my son had to drive my mustang. it had summer tires on it (toyo r-888s). they had no traction at all and it caught him by surprise. he ended up going over a curb, ruining the rims and bending the k-member. he was fine though, and there was no body damage.
now i have year round tires on it in case i need to drive it in the winter.
the problem i have with the whole "summer only" thing is, if my "winter" car is in the shop or out of commission for some reason and i need to get somewhere, then what?