Is not going to church a sin?

even if my mom is always sick and dad is always working? im a young boy who is just going into puberty(it stinks!) i Really want to go to church but my mom is always sick(she has fibromyalgia and bunch of other deceases with long names) and my dad is always working so i don't have the heart to ask him to take me. I really love god and im a Catholic by the way. I also swear A lot at school but i don't even realize it. plz help me im open to change!!!!!!!~~thnx ps. im sorry if i spell things wrong i am the worlds worst speller lol.