N.B. I'm supporting a couple of guys with bankruptcies at the moment and there is a fun side to it. The bank for all it's rudeness and bullying is going to make a big loss on any bankruptcy. So how ever unpleasant it is for you you can enjoy watching the arseholes make a loss and look like morons. It actually makes the nasty letters quite sweet. Also bankrupts get discharged in I believe 1-2 years and then those problems are well behind you. Or if you're earning well enough you can appply for a range of payback options at your local citizen's advice bureau (IVA or lower payements or micro payments) Most of which will eventually clear your debts and retain your assets (and your bank will accept as they're desperate to get anything back.
Of course I don't know what your financial problems are and suicidal feelings are always an indicator that you need some extra support.