I will second on the vasectomy. Best thing I ever did.Never solve her problems. Say “sounds like (reiterate what she just said)”.
Always be a mystery. “What have you been up to?”. Answer “Wouldn’t you like to know?”. In short, don’t answer any questions, ever.
Get a vasectomy ASAP. Health insurance gladly covers it.
Never live with or marry, period. Ever.
You should be alright if you follow this.