I've been in your exact same position for at least 6 years.
My 2 main issues in my marriage were feeling unloved and no affection ever, not even during sex. All I ever wanted was to be loved, I know how sad that sounds.
I've been in a unhappy marriage for the majority of it, 16 years. He was my first boyfriend and I was young at the time so I had nothing to compare it too.
I was unhappy but my reasons for not leaving was the thought of being alone, a single parent and I couldn't be bothered to restart my life.
I've been looking for a way out for many years, recently I found some inappropriate text messages and I ended it.
I've also found someone else very quickly after my marriage ended, he's been in my life for a few years and I do feel it's too soon however I am so happy. I feel loved wanted and desired, it's actually made me realise just how unhappy I was and how much I was missing out on,
I've tried for years and years with my husband talking and hoping he could change I was always very open about my feelings. Things never changed.
The unknown is scary but honestly, life's too short to be unhappy.