How do find our if she likes me or not?

I met this girl in cl about a year back, i sent her flowers for her b-day i didnt even have my name attached,( i sent them a month after i met her), she called me the next day and thanked me for sending them. then the semester ended, about 3 months later she texed me and said"how are you how are things going? then i got her msn address from her we started chatting on msn, but she always seems to cut the conversation short!, when we were chatting on msn abour two months ago she said that the flowers i sent her made her feel very happy why did she wait so long to tell me this?. When we chat on msn she never says good nite? is this some kind of a test or something is she testing my temper, why are girls so complicated? Please help how can i find out if she likes me or not?