What is he playing at?

[Fuckmyliferightnow]

I have NC for this.

I have been observing some very odd behaviour in my partner.
Been together 10 years with 1 Dd.
We own a house together, he earns all the money and I have 2 very low paid jobs. A bit of background.

He's being cagey with his phone, not showing much interest in sex, goes out to his mates about 4/5 nights a week til late, sometimes after I've gone to bed (I go 2 hours earlier than him), his reasons are he can smoke at his mates house.
If he smokes out the back I have spied on him and it looks like he's msging someone and looks around over his shoulder.
He has spent ages on his phone in the bathroom.
I don't know his password so can't look.

He gave his old phone to our daughter to play games on, he left his contacts on there. There are 2 numbers on there that make me feel a bit
One named Aaaaaaaaa and the other named Football. No names attached.
All his football contacts are listed separately so pretty sure it's not a football friend.
He doesn't play football.

What can I do with these numbers? How can I find out if they are female and how can I get names?

This is all the potential evidence I have to go by. Any ideas?

I need evidence to confront him surely.

He will deny and if I can prove he has been lying then we can move forward.

Up until recently I trusted him totally, I have believed everything he has told me previously, but am I supposed to ignore the changes in his behaviour? Allow him to have his cake and eat it?
Let him carry on whilst I'm at home looking after his child?

This isn't a relationship I can just end giving that I'm in a much worse position than he is. So looking in and saying there is no future is easy, because there has to be a future for us and our child.

@OP I am guessing by the phrase “going to his mates for a smoke” you are not talking about normal cigarettes?! I don’t think there are many people who would stand for their DH/BF/OH just bobbing off 4-5 nights a week for a smoke at a mates house late at night. This would immediately rouse suspicion in most people! He clearly also has a second phone that you didn’t know existed! He takes his phone everywhere (even to the toilet) and keeps it on lockdown! He’s also apparently not on social media? He is up to something alright! It doesn’t necessarily mean cheating but he’s hiding something!

My guess would be that he uses the second phone to either buy or sell drugs. Possibly just small amounts for him and his mates.

I can't think how he could sell drugs without my knowing.

If he is having an affair then presumably that is where he is off to when he says he's going to his mate's. If you have a spare smart phone you could plank it in his car with a friend finder app enabled and track where he actually goes.

I'm sure he is going to his friend's, but leaving super early and getting earlier, so going somewhere else first or after.
The phone idea is a good one, I'll have to figure out how it all works.