I love my best friend and I don't know what to do I've told him and he just asked me how long have I felt like this and I told him I'm 17 and he's 18 and I would really like for it to be more than that I really don't know what to do, he send me good night messages and he texts me everyday can somebody please give me some advice?

Ask him if he feels the same way. Much better if you'll know it earlier. Tell him to be honest with you. Tell him that it hurts you more without knowing how he feels than telling you that he doesn't love you. Your'e still young, you'll find someone better.

Ask him if he feels the same way. Much better if you'll know it earlier. Tell him to be honest with you. And tell him also that it hurts you more not knowing how he really feels than knowing that he doesn't love you. Your'e still young, you'll find someone much better.

What is the hurry? You have told him how you feel. Take it one day at a time. The next move is his

I'll try that but I don't want it to really mess up my friendship with him we've been friends for over four years and maybe he doesn't want things to go bad between us. I really want to ask him but I don't want him to think I'm desperate.

I misread your question. You said in your title your best friend is straight. I assume you are gay.
You have told him how you feel now leave it alone. If he were open to anything he would let you know.
I'd leave the friendship as is if I were you.

I don't think he's straight because he asked me to give him details about what me and another boy did , what straight Guy would want to know that?

He could be straight but curious. That does not mean he is gay. I'm assuming you are a teen. .
At any rate, you have told him, now leave it alone. If he is your friend, respect his choice and boundaries just as you want others to respect yours.