<human>: As summer is coming up, my SO and I wanted to go on a short vacation (likely 1 night 2 days) to a popular retreat that is only 2 hours away from the city we live in. We would pay for this vacation ourselves. Might I add we've been together for 6 months now.

The problem is, my parents are the very worried, I-don't-trust-you type, so I'm not exactly sure how to approach them with this. His parents don't mind him going for vacation as he is a bit older. I'm 19 but I'm quite mature for my age (but they don't think so), and I am a responsible person. I have a job and I get good grades in university.
I know that if I ask them they'll think negatively of it because I'll be alone with a guy and I won't be at home with them. My SO and parents have met for a while already and they seem to be fine with him although they're probably still skeptical of our relationship for whatever reason. My parents are not the most familiar with him, but that's also the problem here; they think that just because they're not familiar with him, I'm not either. My parents are pretty much the type that won't let go of me.

We're really looking forward to spending our first summer together! I'm just not sure how to approach my parents with this situation and how to get their permission and trust.

Can you condense the text into three sentences or less?
<bot>: SO and I of 6 months want to go on a 1 night 2 day retreat 2 hours away from the city we live in, but unsure of how to ask for permission from my untrusting and attached parents.