If you like the girl that much any time with her isn't wasted. But who knows what the hell she is thinking...most of us our guys. I have to applaud you on your bravery, if I found her making out with random guys I'd run away. It's wierd, I'll fight about everything but girls, I'll never "compete" for someone. I figure if they aren't sure who they want then something is not right.
Anyway, I'd let her know how you feel (how much she means to you) and how you'll always be there for her. Which should be and sounds like the truth. If she drops all the "side projects" and falls into your arms, life is good. Any other response, and I wish you luck.