Help!

Read above.
… which is 8 months away from my 18th birthday...

Idrk what I’m doing but I just want help. I need help to write some kinda persuasive essay or page to convince my parents to let me drive 5.5 hrs away to see my bf. They are aware that I’m talking to a guy but they do not know anything else. I’m gay, so it’s abviously much more difficult. They are “loving” of me but not necessarily supportive or non-supportive. I have been talking to this guy (17) for 7 months.