My parents divorced when I was young. We lived with our Dad (a VERY good thing). When I got married, I was determined that it WAS going to last until death do us part. He changed....and I hid most all of it from my family and friends. Putting up the facade that things were perfect.
I held on as long as I could take it. I thought it was the right thing for my two sons. I had suggested counseling, and many other things. He wasn't willing to do anything. Things got bad enough, that finally I had to leave.
Yes, it can be very hard to be a single parent. It can also be quite rewarding.
I can remember all the things my birth mother (that's what I call her because she doesn't deserve any better, and yes I've tried many times over the years to foster a relationship) did. Those memories don't completely go away as one ages.
Fast forward to my adult sons.....and I still hear things to this day that I THOUGHT I was doing very well hiding from them. I wanted them to think things were ok between their dad and myself.....only they saw and heard FAR more than I ever had a clue about. It saddens me to know that they were subject to this.
I have since remarried, and this I do intend for life.
I took my time.....I knew what wasn't acceptable to me in a relationship, and what I could and couldn't live with. After 5 years, and him not changing into someone else....and our relationship only getting stronger....I knew it was going to be ok this time.
Divorce is hard, and if things can be worked out...great. Sometimes it just doesn't work though. I actually divorced my first husband, then got back together and remarried him because of false promises. Things were ok for a little while, then back to the same thing.
Good luck with whatever you decide is best for you and your family.