Long before I split from my ex H I remember a time when both our children went away for a few days. They were still relatively young and we had a taste of being 'just the two of us' again. I found it a little worrying. We had little to talk about and I realised that a future when the children grew up and left might not be so wonderful. However I stuck with it, and it was mostly OK.
Then we moved to a new area, forced by redundancy, and things were difficult. He started an affair after meeting someone online. I found out 6 months later and we decided to separate, though for a while he continued to live with us - in the spare room. I didn't kick him out because after 19 years of marriage I was too scared of coping alone, especially with 2 warring teenagers to deal with.
Eventually she moved nearer and he moved in with her, but we didn't divorce for quite a long time. When we did I negotiated terms that suited me as by then he'd been made redundant again and was moving abroad for his next job. He prevented me getting a divorce when I first wanted it as I think he thought he'd get a better deal when the children left home for university. In the end I did well financially, but only because circumstances allowed me to get a good deal because of his move overseas.
I regret not kicking him out straight away, but in the end it worked out for me. I was wrong to worry about being on my own - it suits me very well actually - but it may not suit everyone. It can be lonely at times but I have plenty friends and good family, though they all live a longway away. It is harder in these lockdown times as I miss actual human contact, but I'm not having to tolerate another human being here that I'd rather not be with.
I had a very good solicitor, recommended by friends. His solicitors were probably recommended by his mother as they were in his home town, though he was living abroad. I suspect that cost him dearly! Do your research.
If you can suggest a plan for settling things financially try to do so. I saw an opportunity and grabbed it but I wouldn't have been able to do that if he'd been staying local.
Also try not to make a life-changing decision during lockdown. We are all under stress at the moment and things may look different at some point in the future. My daughter, who has a big opportunity in front of her at the moment, says she doesn't want to make a decision 'with corona goggles on.' But if you continue to feel the same, go for it. Life's too short to live with regrets.