Hi @Givemeabreak88
I'm a totally lone parent due to being widowed when pregnant with DD2.
I started dating when DD2 was 15 months (by which point DH had been gone 16 months). I actually met someone very quickly through the apps. I used evening babysitters. I never understand why everyone assumes single mums are free for coffee dates when the kids are in school - most of us are working to put food on the table!
After a number of evening dates I felt comfortable with him coming over once DC in bed. But only because my DC never came out their rooms at night, they always called for me.
The relationship lasted two years. He had 3 kids which he saw every weekend. It ended because we didn't feel strongly enough about each other to blend the kids, which would have been hugely disruptive for them.
18 months after that I met DP, after a series of awful dates! Again paid babysitting. DD1 was 8 by then so too old for me to have someone over in the evening without her being aware, so I simply warned her if she heard an extra voice I had friend over. She's used to me having friends of both genders so it wasn't an issue and just like my best female friend coming for dinner. He obviously couldn't stay over though.
At 6 months he met the kids and some time after that DD1 agreed he could stay over.
Two years later we live together. I'm now 40 BTW. I probably wouldn't seriously date a man with children again as blending children is incredibly hard and wouldn't be fair on my DC. Makes the pool very small though.