Its not that I don't want to hang out with my colleagues during my lunch hours, I just have too much other stuff to do like running errands, paying bills, etc.

Its not that I don't want to hang out with my colleagues during my lunch hours, I just have too much other stuff to do like running errands, paying bills, etc. However, I made an effort to have a coffee break or such with my colleagues when they have them. I think that is a good compromise for me. Furthermore, I rather spend the time I have at home with my family rather than doing the mundane stuff that I can during my lunch break.