hey @Flea10, thank you so much for reaching out and welcome to the forums 
I'm sorry you're going through this situation. I completely understand that feeling of being able to intellectually understand that what you're experiencing is gaslighting/abuse, but struggling to emotionally come to terms with that knowledge. It can take a lot of time to process, and then heal.
For me, what I found helpful was distance and space to have that time to process, and surrounding myself with people and resources which were supportive. Unlike greenpea I wasn't able to feel strong and ignore it - my self-esteem had already been worn down quite a bit by the time I realised what was happening- so I found additional support to be helpful.
I can't help but be concerned for your wellbeing- if you'd like more of a space to unpack and explore the emotional impact of coming to terms with this, in a safe and supported environment, some options are contacting our counsellors at the SANE Help Centre, or contacting 1800 RESPECT who specialise in (un)healthy relationships.
Sending lots of support for you
Take care