I dont know whats wrong with me i just can't be bothered lately?

Recently I have become really down, everything seems to be getting on top of me, my home life, my relationship and just general struggles it will be 3 year since my dad passed away in june i am 21 years old and find that really hard to deal with me, i have a 9 month old daughter who i love with all my heart but recently my depression has been taken out on her, I just don't seem to have patience with her lately and i feel bad for that so much, like when she crys it now just annoys me rather than kick my fatherly insticts to be there for, i know this is only temporary and i love her so much she is my world i just seem to have a shot fuse, i never get to go out with my friends either thanks to a controlling girlfriend.