I have a 'distance' relationship of about an hour away, with boyfriend of three years. He's made it clear he doesn't want to live together, we both have dc and jobs/lives in our home towns. All seemingly fine, we see each other each week.
However, recently I've had suspicions that he may be cheating. I'm not someone who demands to see his phone etc. He has had the following 'odd' behaviour though.
Three Mondays in a row he hasn't phoned or messaged me. This is despite me messaging him as usual on that day (just a normal 'friendly' message, nothing heavy to ignore...). In the past/present we usually chat on the phone most days and message, but again, if I've called him on a Monday he doesnt answer.
He's on WhatsApp late at night sometimes, not messaging me...of course, could be innocent, but seems odd to chat like that as a regular occurrence to friends/mum of his kids. One evening he sent me a message meant for another female 'friend' who I'd never heard of. He said it was a former work colleague/friend when I asked. This was 1030pm, so later than people usually chat as 'friends'. I asked him outright if it was a girlfriend, he said no, if we don't have trust what do we have etc, also that he's been cheated on in the past etc he wouldn't do that to me.
He also has some stress issues, but his behaviour seems odd and disappearing for a day at a time, then chatting lots as usual seems bizarre.
I dont feel it's right to ask again with no solid 'evidence' but equally I feel quite confused and anxious wondering whether he's cheating. Any ideas finding out what's going on?