Help ?

So, last night(12/31/18) my family and I went to six flags for the fireworks, and I invited my friend along, who I'll call Billy. So at the end of the night(six flags closed at 8), we take my sister's boyfriend home and then we take my friend home. Now, I've liked Billy for a long time and last night, I walked him to his door and told him how I felt. He said he felt the same way, and we went out separate ways for the night. Now, I'm starting to feel like telling him how I felt was a wrong decision. I don't know why I feel this way, but I just feel like I should've waited longer, and I kind of don't know what to do from this point?