guy bestfriend 😅

Soooo... me and my guy bestfriend have known each other since middle school and he's stuck by my side relationship after relationship🙄...I've been single for some months now and he recently told me he has feelings for me! Wow, I couldn't believe it at this point I don't know if we should take it to the next level or just continue to be "friends"?  🙈😳 any advice ladies ???