I was going to leave this, as I’m no expert on this.
But didn’t want to walk past it so hopefully someone else can comment too.
I’m not sure this is the right forum to discuss this, as in the help you need probably can’t be found on a computer.
I do however have some initial thoughts.
Firstly your safety is paramount. Just because you have approached them On an app does not mean they have the authority to do what they want, likewise you have no reason to let them do what they want.
It’s always worth having a discussion about boundaries etc before going, also let a friend know where you are. I’m worried for you turning up to these guys house possible at night.
Condomless sex risks STI and pregnancy if not on pill. Please if you continue to have sex unprotected you test regularly- STI are very sexiest towards women they do you more harm than it does him, don’t rely on them to keep you safe.
In regards to the role play of been underage if you don’t like it then don’t do it! I find it a bit unsestaling reading this, how long before RP is not enough for them and they seek the real thing.
Please stay safe, let me know if any of this is useful but I hope someone else can comment. I am really concerned for you.