Oh really i can get a neutered bunny?
Yes
Many rescues prefer to get rabbits neutered before they are rehomed. It will probably be cheaper to get a neutered rabbit from a rescue, than to get a rabbit from a pet shop/breeder and then get her neutered at the vets. Rescues usually charge much less than the rabbit has actually cost them in food/care/vet bills.
As Rhian33 says, you really have to have a female rabbit neutered for her own health, it's not just to prevent unwanted babies or to help them bond with other females. (Apparently most female rabbits will get uterine cancer by the time they are five years old, if they arent neutered.)
My own personal experience of one rabbit is that yes a single rabbit CAN be happy. It may depend on the rabbit though I guess - they all have their own temperaments like people do. Again, if you get a rabbit from a rescue you can ask them about the rabbit's personality.
Cat's point about companionship is very important though - if your rabbit doesnt have a rabbit friend, then YOU have to provide that company yourself. And I can tell you from my own experience it is very time consuming and changes the way you plan your days. (For example, I work full-time so now I get up an hour earlier so that I can spend some time with Muppet before I go to work. He's already spent all night alone so I couldnt just go off to work without giving him some company first, that wouldnt be fair on him.)
Have you thought about how you will afford all the vaccinations that a rabbit needs? There are three every year (two for myxi and one for VHD) and they cost roughly £15 to £20 each. That's £45 to £60 for each rabbit. What about emergencies or will you be able to afford pet insurance? Sorry, I dont mean to put you off but if you dont have much money, these are all things you need to think about!