Feeling depressed and not going away?

i moved to oregon portland 7 months ago.. i ve been having a tough time meeting people and always feel like an outcast at work or school. i talk to alot of people but none that i could say are friends. on top of everything my girlfriend broke up with me 2 weeks ago and spend alot of time crying a really feeling alone cause i use to talk to her every night..but now she said she dosent even want to be my friend... i feel like everything is stacked up against me.. i go to school and work .. i go to bars bymyself and cant seem to find any1 to date.. i feel like i should be happy right now and its breaking through but this felling of sadness and depresion isnt ???? what do i do???