Tips/Advice on sneaking out

I need tips to sneak out to see my “bf”. We aren’t really in a relationship due to it being hard to see each other and distance when I’m out in college. My family won’t approve of me being in a relationship. However, we have been talking for a few years now and seeing each other for like two years. But I don’t want to push him away because I think he might be the one. So I’m home for break and want to see him. However, my older sister is always around so I don’t know what to do to sneak out…