There is a new male colleague of mine who started to me to hang out alone with him since 2 weeks ago and texts me every night after work. It's obvious that he is hitting on me but he just doesn't make it specific. All I can do to reject him is to turn his invitations down and give him dead end answers. But the next day he 'll catch me in office and try talk to me again. Obv he doesn't take the 'hint' that well. What do I do?