It is usual trait of the men to think about the women around them. Be it in college or in the office. As a man you are often attracted to the physical looks of the women. It is true that for a small percentage of the men, the personalities may match in the real life, but for the rest, it is more about pursuing a woman, when you are not even sure if your thoughts about life, the daily activities, dreams and physical intimacy align. If you are lucky enough to be in the same team in office, or the same class in college, then the chances to gauge the personality, desire and spark is there, otherwise it is more a wild goose chase.
Trying to come up with lines or pursuing a woman who happens to be around you physically but has to logical connection with you, usually takes up a lot of time. Get of this frame of mind and the method of method of meeting women.