Recent studies hve shown that hpv may be transmitted via fomites.as someone w/ hpv g.warts, should i wash my underwear separately from other clothes to avoid contamination? is it possible to transmit my hpv by sharing a bathtub, toilet with roomates?

No worries: In real life, that sort of transmission does not happen. Many things are possible in life, but worrying about the ultra rare events will make one's life miserable. One can just get vaccinated. One can also live a normal laundry experience, with normal washer-dryer habits, normal handwashing, normal sharing of bathrooms (meaning be clean enough to not catch other's diarrhea, and things will be ok).