How do you know if you are gay bi or straight?

My guess is that you are a younger person (twenties or younger). Just enjoy your friends, stay safe with any sexual activity that you might enjoy, don't push yourself sexually on anyone, and allow yourself to grow. You have a sense of who you enjoy spending time with; just spend time. Sometimes we put way too much emphasis on labeling ourselves and others. Sexuality is on a continuum, and that means that it is ok to have the sexual feelings that you have, whether they are oriented toward males or females. I'm not saying that it is ok to just act out any time you have sexual feelings; healthy people can have feelings without always acting on them. Just don't fear that you are feeling what you are feeling. Many people have had one or a few experiences with people of the same gender and end up happily heterosexual for most of their lives. Others remain happily gay. Don't worry about the labels-- just enjoy being with your friends.