I think I

Ok, so I have known this boy, Ill call him Will, my entire life, literally since the day I was born. We were always best friends, wed go on family holidays together, and we would hang out a lot, in a group and alone. I started getting feelings for him about 4 years ago, but Id always kind of fancied him. His sister and mum said that they think we will end up married, so that makes me think maybe he likes me? Or at least that we are good together. Whenever I know Im going to see him I get nervous and want to dress up, and whenever Im with him I want to be near him. He always suggests us hanging out, and today he came home from the bar with his friend (who works there) because me and my mum had dropped by his house for 20 minutes. We made plans with his mum to go to the cinema tonight, and he messaged me later and asked me if he could come, and changed his plans to do it. We talked the whole way there, and he had dressed up a bit and had a Lot of aftershave on, and I just had the best time. I think I love him, but I dont know if hes just being like he always has with me, or if he likes me back, and Im far too scared to ruin our friendship and our familys friendship to do anything unless I know. I dont know what to do!