I had a senior in my office...few days back when i was?

on my way home i was just about to cross the office premises when somone called me..when i turned back it was him.. we both stay nearby so he offered to drop me to my home....i said yes just because till this point of time he was very silnet sort of guy..he is young and peronality is also good ...on our way he had to pick one of his relatives...so we were waiting ..while we were in the car he held my hand and started asking that whether i like him or not..he then tightly held my hand kept it on his heart and asked me out for a date on a movie on weekend ...i was completely shocked i just didnt expected this from him....i jus said i will think about it...when his relative came...he introduced me to her....next morning he again called me to pick me but i didnt recieve his call... in the evening when he was leaving he called and asked me to leave...when i said it will take me another hour he said he will wait...at that time i and one of my colligeue were discussing something..he jus came and started shouting at him ...he is at managerial level..anyways...i just packed my bag and started walking but again he approached me and said he has something inportannt to share regarding work so i again sat in his car..he again held my hand...this time i straightaway asked him "what is on your mind" he replied "everything cannot be narrated somethings have to be understood" and started playing a song....But i have already heard many stories about him flirting with girls....and i straightaway told him about all those..he was unable to react...he confessed he was trying on me....he said he wants me to be his girlfriend..and there is nothing wrong in it...i objected and said i am not nterested ..in the meanwhile he had to pick his friend when his friend got into the car he introduced me to him saying that "she is my girlfriend" and he also told my company and profession other than what i am....i said first of all i am not his girlfriend and secondly when i dont work in so and so company he started acting as if also didnt knew...then when i said we both work in the same company he stared at me as if why i am saying all this...i got down in between...then he called me at night and i didnt pick his call...next morning when he came i just yelled at him..he said i agree it was my fault..and it wont be repeated again...last thursday was his last day in our office i didnt knew that...in the afternoon i was dialing my friends number by mistake i pressed dial on against his name.....while leaving he came to me smiled at me and was just about t say something and someone called me and i just went away..everyone in my office knew about the whole incidence...anyways i then texed him that i didnt call you tat cal was by mistake done...my question is why he did all that any idea guys.....and from starting i really had a gr8 impression about him and i never wanted such thing to happen.....i feel sory for myself...was he actualy serios...what was on his mind..can someone explain please :( :(