10 Year old boy

I am a helper at a youth club that meets once a week, and Is attended by 10-14 yo boys. For the last two months these two 10 yo boys have been attending, they are best friends and I like them both. (Emotionally and physically). I want to spend more time with them outside the club, but being a helper I don't want to compromise any position of trust, and/or I don't want them to freak when/if I ask them to spend time with them. I really like these boys and would like to get to know them better, I am just not sure how to approach this situation. Other leaders spend time with kids families so I don't see why it would be a problem

Any Advice would be appreciated.

Kenty