Horse will NOT go and bucks?

I am very scared of my horse right now. He use to go whenever I asked, but now he literally will not move. He will go toward his buddy (I put him in a little corral so he won't distract) but nooooooo, when I move the opposite direction, he will not budge. The worst part is if I just squeeze him normally, he'll back up. I do it again- a hard buck! He doesn't do it ten times in a row like a rodeo, but he will do a buck. So I try about 3 times and he just repeats. After that I just dismount so I don't put myself in potential danger. Also, if lounging (IDK how to spell it) the answer, how do I lounge? Please help- I am very worried about my safety. I know spurs and a crop aren't the answer, that will just make him angrier!