How do you keep the board level and under you when you a kickflip?

Hi, I can ollie, shuvit, pop shuvit, boneless, boneless 180, board slide, sometimes 360 shuvit, but I need to land kickflips like my shuvits which is like every time so I can move onto varial flips and 360 flips. I'm really sick of not landing this trick and I've been practicing this trick for five months and landed about 40 or so of them. The board will always shoot in front of me and the board will always go vertical and one of my biggest problems is having a very hard time poping the board and being afraid to jump high and then when that happens the will shoot out in front of me, spin back side, or go straight behind. So please tell your best advice on how to stay over the board and how to stop being afraid to pop the board and jump really high. Thanks!