What should i do about him?

So theres this guy that i really like who i use to work with hes jus left to start a new job, We got on great at work always flirting and spending time together going out together on our lunch breaks but the thing is we both never admitted we liked each other which im pretty sure he felt the same cos i got that feelin wen we was around each other and he always wanted to spend his time at work wiv me.. So anyway i never realised actually how much i liked him until his leaving party when a girl at work told him she liked him and i felt really jealous she was trying to dance with him n was following him around crying sayin she liked him which at that point i was close to sayin something to her so i decided it was best i left n went home bcus everyone was really drunk including myself and i didnt want to do anything id regret lol soo after about 20 mins after i left i recieved a txt msg from him sayin im not gonna lie... i like u... which to i responded well y didnt u tell me... i left bcus of her.. After that i didnt recieve one bk but weve spoken a few times on facebook but he never mentioned the msg he jus asked me y i left early n i sed bcus i was drunk! which now i wish ida told him the truth when i had my chance!! Also now the girl who likes him is writing status's sayin..Him <3.. and changed her profile pic to a picture which got took of him n her that nite..Now im thinking maybe he thinks i dont like him so hes gonna get wiv her n i feel like cryin everytime i read status's she writes but hes not writing anything or changed any pictures n hes still commentin on things on my wall what should i doooo!!! ps my guy mate txt him today askin if he would get wiv the other girl n he replied "haha.... she can wish!"....... sorry for the essay!! thanks for readin x