H and I have been living separate lives (he stopped speaking to me out of the blue) since the start of the year. He's away in Spain (his home country) and has been for 4 months now. We share a 3 years old DD, which he has spoke to once since he's been away. Today, I was looking into his USB stick which has all of our photos, I found a hidden snapchat file from his 6-week holiday in Spain last year (we were completely fine, no issues. Our marriage was ok). He said he was going to Spain to visit his family for a couple of weeks and ended up staying 6 weeks. I couldn't go because of COVID. I found screenshots of conversations with a woman who he met in a nightclub and they slept together. Lots of videos of him in nightclubs with his friends and other women, as well as house parties where him and his friends invited tons of women. A photo of his rolled up cannabis joint. Receipts of hotel bookings, one costing over £1000.
On the way back to the UK, he stayed in luxurious hotels in London and Manchester two nights each with another woman that came with him from Spain, he also paid for her flight back to Spain from London.
I don't like nor love him and haven't done in a long time now. I'm just shocked as whilst he was away in 2020 he was texting everyday saying he loves us and misses us and asking to see pictures of DD. I've also just realised that he passed on something onto me, because after we slept together last year, a few days later I had a horrible infection and really suffered for weeks with itchiness etc.
I haven't filed for divorce because I've had lots of health issues and COVID and I also started a new part time job, DD started nursery part time, so I have to drop her off and pick her up (6km walk in total as I don't drive) and just finished my studies a couple of weeks ago. I'm waiting to graduate and pass my driving so hopefully I can get a full time job. My question is; is it worth taking a copy of all of the photos and videos (in the videos he doesn't show his face as he was filming) and use them in my divorce case?
Also, he owns the house we live and has the paid for the mortgage for the duration of our marriage which is about 6 years. He also pays all bills etc. Since we separated, as per a solicitor's advice, I have remained in the property and I do all the caring for DD and food shopping.
Although he's away, he has continued to pay all bills but haven't initiated a divorce.
Through some digging, I've found the girl he travelled to London and Manchester with. Is it worth making a fake account and letting her know he is married and has DD as I really do feel sorry for her, and he is most definitely lying to her about everything. I'd hate for another woman to go through what I went through.