Please help me frndss?

my exams are going on and the centre where i go for exam is centre of one other college also.. There is a grl of that i other college whom m watching since last year i dont knw why i am so attracted towards her,yesterday was my exam and i watchng her my freinds and me noticed that she is watchng me too , what should i do ? I was planning to go and talk to her on the day of last exam but problem is i even dnt knw her name we are completely strangers to eachother , how should i proceed ? Should i go and talk to her ? How should i start the convesation ? Please assist me ??