i like him alot :)?

I grew up with learning disabilities so ill try my best. I need help!!! i been crushing on this guy for long time on and off now cause he live in different state. we meet on a team 4 year go but i havent seen him in while but we been instagram friends and he have been liking my comments but idk if he know i actually like him cause i told him once about two year go that i like him and he said something i appreciate you and said thank you that mean alot to me so idk if he think different, do i go message him again to say it? I always been the shy one & usually the ones i like end up not like me back :( but he also never like my photos only just few i had post for the team and he shared it for his fans back his home state, 

what do i do? do i say it again?