So kissing freaks me out

Laura • 22 and loving life. I`ve never really dated, but this app is kinda fun anyway. =P
So I'm 22, and besides being sexually assaulted about a year ago, I've never actually kissed anyone. Problem is...every time someone goes in to kiss me (even if it's someone I like), I freak! I hyperventilate and turn my head and...well, it always hurts the guy's ego...and I mean, the reaction makes sense...considering the situation. But it's also killlllling any and all possible relationships because...well, guys are physical. And I'm 22, not 13...lol. So basically, my question is: (besides therapy, which I've gone to) how do I make it easier to kiss someone I like? Thanks. :)