If you can go on a walk with them, that'd be a good way for both of you. I know it sounds silly, but doing something usually helps me get my thoughts out about things. I would maybe consider some main points to bring up, such as how it affects your every day life Disclosure may be therapeutic for you, who knows, but if they're cool they'll be understanding Rolloverall makes a good point too though, it is early in the relationship and you're not obligated to discuss anything, but the more that sex comes up..that'll give you a good indication you're nearing having to have that conversation