Hmmmm ahhhh if you really want to dump her then please do it properly not like that talk it properly, what can I say besides disappointment.
I know it's the MC first time fall in love, first time close with a women, first time met her parents, I know everyone have their first time too sometimes everyone do badly but at the very least please don't run away, I hate people that just run away he doesn't have any responsibility sense, at least be responsible, you have slept with her right? Even though you haven't sex with her yet but you still have slept with her, you need to be responsible she's your girlfriend don't just leave her like that you're dating with marriage in mind. Jeez I hate herbivore like him that always run away when he's cornered.
Edit: I'm sorry for my typing, it's quite hard to read because my punctuation is bad I'm sorry