Hands up, I read his fb messages. We're open and allow this with each other, but I realise I went digging .
DP's message to male work mate "I had trouble balancing 'me' time and 'couple' time on holiday too".
Me time = cycling, of course. Couple = As in, he had to spend time with me on our 1 holiday that year 
Now, this wasn't even a recent holiday but I'm furious reading this.
I engineered that holiday to pander to suit him. The location was chosen due to good cycling, found a decent bike shop and made sure our hotel was in walking distance. I even went with him to the shop to help pick up, as neither of us had our bearings.
6 out of 7 days he spent cycling, not one of them was a lazy day spent together at the beach or pool. I even sorted my own separate activity, which I enjoyed but was purely because I'd have been bored witless otherwise.
AIBU to be annoyed at him?! My mum recently made a passing comment at how we don't seem to spend much time together, which has touched a nerve.