Awkward crush situation

So I’ve known my crush since I was a baby, our mums are friends and we live on the same street. He moved away to Singapore for a few years and then came back like three years ago.

I have seen him a few times with our families since he’s come back but not much really, I do see him around school tho

But now I’m starting to get a crush on him and it’s kinda weird cause he’s two years older than me (I’m 15) and I’ve known him forever.

I just don’t know what to do and I had to get this off my chest cause its bothering me so much