I think I'm depressed..?!

So i moved to the other side of the country in September and moved in with my sister who was going through a divorce. I was able to transfer offices from my current employment and was excited cause my office was super awesome and then got here and realized this office was totally different so now i hate my job. i've been having a really hard time making friends because everyone at my work is older and i'm quiet and shy and don't know how to approach people or how to meet new friends. luckily, my best friend lives here with her boyfriend but she doesn't have many friends either and the friends she does have is other couples through her boyfriend and all they talk about is their relationships. i've been single for almost 2 years and i just feel really discouraged about love because my last relationship ended really horribly. i just have no motivation to do anything and i don't know what i want to do with my life. i spent like all day yesterday crying after i found out my grandma had a heart attack. i really miss my family and friends back home but i don't know if i would be any happier there. i just don't know what to do. i have all these new financial responsibilities and feel like i can't live the lifestyle i want to so i just feel like useless and wanna spend all day at home in bed.

do you think i'm depressed? also, any advice?