Im in love with my best friend

So, ive been friends with this boy since the beginning of primary school, we are now in year 7 (first year of secondary school) he is still my best friend and we hang out all the time! But i just love him. When hes near me i get all red and tingly and when he’s with other girls i get so jealous. I just care about him so much, i cry over it sometimes. I wanna tell him but i’m scared that it will mess up our friendship. He will probably catch on soon anyway because im so clingy. But until then what do i do?! Do i tell him.

Help please?