Welcome! I hope you find information that helps you with your questions and concerns.
I do have some questions if you don't mind... Why does your boyfriend not want you to date people in his town? Is he trying to make sure people don't find out you and or/he are poly? How far away is this town? Is it far enough away that it takes an extra effort for you to travel there or is it like a 20 minute trip that can be done pretty much any day?
I guess I don't understand not wanting the people you're with to date other people geographically nearby. I understand not being comfortable with them dating coworkers or people in other relationships that could turn awkward (family, mutual friends to name a couple), but an entire town? Seems excessive. Granted, you do say the guy is involved in his life, so it is in a capacity that could be affected by a relationship with you?