I think im in love with my best friend?

so i have been best friends with this guy named robbie for 3 years. when we first met we instantley liked each other but we didnt tell each other until a few months ago. hes perfect for me, and we are obviously close since we are best friends. he told me he had liked me forthe 3 years we've known eeach other and i said i did too. but then i met this guy named gavin and he met this girl named grace. hes in love with her and gavin and i went out for a few months but now we're done. so on the 4th of july, me and robbie were sitting in the middle of the street just listening to music, watching the fireworks and talking like normal best friends do. so we got up to help me get up and when i looked up it was like time stopped. he stood there staring at me with the stars behind him smiling down at me and i had the biggest smile on my face. we started laughing and he was like "what are you smiling at me that way for haha?" and i just laughed and said nothing. his girlfriend waas in europe, that is why she wasnt there. they are completely in love and i am super happy for them! i am not jealous at all, i just have dreams about kissing my best friend and that momwnt when it felt like the world stopped.. i just cant forget it. what is your opinion?