Just because I am bisexual doesnt mean I want to be with just anyone, how do I make that clear to my friends that tease me?

Get new and better friends, then keep new and better friends close. Your new and better friends will love and accept you for who you are.

This prejudice about bisexuality is unfortunately very widespread, but like many misjudgements, it's mainly due to lack of knowledge. It's easy to accept a distorted idea on something you ignore, and bisexuality is a topic that people are rarely familiar with. It may take some patience, but if they're willing to listen, you can open up with them and help them understand better what bisexuality means and how bisexual people feel. It can help to compare it with other orientation, since the principle is the same: an heterosexual man won't just be attracted to any woman he sees and go with any woman, so why should it be different for bisexuals, even if the numer of people they could potentially be attracted to is higher? Maybe the just need to get familiar with this way of thinking the no one has ever proposed to them before.

First off they aren’t your friends if they belittle your sexuality and tease you for it, second off, why does it matter to you if they can’t see that just because you have a different sexuality than them means that you will just go out with anyone. Being bisexual doesn’t make you available to everyone, you are still a human being that has feelings you want to be loved!

Well, what I did was tell them straight out. Plain and simple, just say exactly what you put in this question. Tell them that you want to be in a good relationship, just like straight people. Tell them how you feel about the teasing. And if you have made it very, very clear, and they keep teasing you, then perhaps it is time to look for some new friends. But hopefully, it won't get to that. Hopefully, they will accept you. When you tell someone exactly how you feel, it avoids more hurt and misunderstanding than trying to ease your way around your thoughts.

You should explain that you are just like them. There are people you find attractive and there are people you don't. You fall in love, just like them, but it necessarily does not have to be with only people from one gender. This does not mean you'd like to be with anyone, it just means that you do not mind whether it's a boy or a girl. For example, your friends may be attracted to girls/boys with blonde hair the same as brown hair. This does not mean that they like anyone with brown hair or blonde hair, it just means that they like both types of hair colour.