When I have those thoughts, for me it is easier to acknowledge them rather than try to ignore or bury them. Then I say, well, I can think that but I won't act on it.
Fighting the thoughts just makes the depression worse for me.
Also, I am another one you can talk to if you need to. I don't trigger easily.
Don't let the thoughts ashame you or scare you, it magnifies them then. Try to just roll with it and tell yourself they are only thoughts and they cannot hurt you.
Unless you develop intent, you are OK, even with those thoughts.