If you've liked someone for along time and you don't know how they feel what do you do?

i liked this girl for a bit and we been good friends for a long time but I have know idea how see feels ? how do I talk to her and ask her questions about it?

Catch her in a light, jovial mood and say, "I think you and I would make a great couple, what do you think?"

Just be upfront about it, tell her how you feel. If she knows how you feel you'l feel alot better. Then that way it's out in the open.

Hope it works out for you.