he count tell me when he'd been on this website?

ok so i'd asked a question about my bf being on a live sex chat website and it had eaten me up inside so i asked him about it on the phone today.

he couldn't tell me when he'd signed up to it just that it was ages ago and couldn't remember whether he had been on before we got together or whilst we were together. that bit kinda got to me but he told me not to worry about things, that they were ok with us atm and stuff so i felt better about things.

i still feel a bit confused about why he couldn't tell me but i feel better about the whole thing since he told me to stop stressing. what do you guys think about him not knowing.

i feel much happier but im still not sure about the guy i thought was him on there so im still going to look just to fully make me feel happy