Well im pretty much the happiest i have ever been because (i think)i finally have a girl i really like! Alrite so now i know you guys are going to call me clueless or stupid but there is this girl and she completley likes me and weve kissed and we act like any couple would.. only problem is

I NEVER ASKED HER OUT!

so is this a problem at all or should i just shrug it off and pretend i asked her and tell everyone we are dating?

i wouldn't do either. do a combination. ask if SHE thinks you two are together. if yes, congrats. if no, ask if she wants to be with you as an "item".

Ask her out if you want. Don't go telling anyone anything until you're sure. How long have you been doing stuff with her? She may not want a relationship. Best thing to do is if it's been a while, ask her to be your girlfriend. If it's been like a week or something, wait until it's been at least a month or two.

just talk to her. asking out is not a prerequisite. say, "what are we?" if she says "i don't know," then maybe say "i want us to be something," or something.