I'll third the response on expect lies.
I learned to believe the actions and not the promises, apologies, and excuses.
When they say you are too good for them and that they don't deserve you -BELIEVE THEM!- it may be the only time they're telling the truth.
I also learned: That I had an addiction to damaged men
That I confused compassion and pity for real and healthy love
That I will run like hell if a man ever tells me he ever had a
long term addiction to anything.