I came across this website while doing some research for my character Lilly in my book Never Too Late.
I thought it was a really interesting site, it outlines different types of mental abuses with examples.
This may be useful if you don't know the signs.
This website outlines in detail the cycle of emotional abuse.
If you think this may apply to you please read the site so you can recognise, deal with, and hopefully escape from the 6 stage cycle of emotional abuse.