She loves me, but only when she's drunk?

That girl I've been dating (I guess) for a while now has sent me a lot of drunk voice messages before, telling me how cute I was and calling me her "almost boyfriend" in front of her friends, and last week at her birthday party she got drunk once again, became really affectionate and even kissed me. When she's sober however, she doesn't really seem all that interested in me, has made it clear that she isn't ready for a relationship yet and doesn't want to be more than friends...