Riding bicycle without using seat
Traveling long distances on a bike seat is almost always going to be uncomfortable when your body isn't used to it. Give it time.

But also, consider taking your bike with you to have a professional make sure the seat and the bike fit you. Some people have managed to permanently damage their blood vessels ( I won't go into detail ) by improperly sitting on a bike seat. Call around to see if there's a bike shop near you that can help and ask how much they'll charge you.