To be short... I talked with her 2 mounth ago on facebook, and set up a date when college will begin, I forgot her, and 2 night ago I was in a club, and she camed to me, said "heey how are you" I didn't knew who she was, didn't remind about her, told her that I don't know who she is, but I started dancing with her while we were walking, It kinda becamed a sexual dance.... and suddenly a dude camed and amog me, he took her in his arms and said heeey how are you and kissed her on the chick, and I din't knew how to react, and started dancing with other girls! Next day I searched her on facebook and reminded about her, and sent a message " hey I didn't really knew who you were last night, but now I remember!" and she replied " I noticed that you didn't knew
" How do I go on from here? Am I lower value to her now ? I will surely invite her to town, to help me study the game 
but give me the best advice of what should be wise to do in this situations?