I'm sorry you are going through this and I know it must be so difficult to do this. As a T, and knowing that you've tried before and and he's persuaded you to stay, I'd advise you not to do this in person. It's a professional relationship, not a personal one, and therefore you don't have any obligation to terminate in person. A text or email is completely appropriate and hopefully will lower your anxiety about this. This is about you, not him, so you need to do what's best for your emotional well being.

Clients are not obligated to do a "termination session"- that is a therapist's obligation when they decide to terminate. You could just cancel your next appointment and never go back without a word and that would be OK too. I understand you are close to him and may feel rude saying nothing, so I would do a text or email. This way you avoid feeling pressured to stay. Also, it is unethical for a T to talk you into staying when you terminate. He should not have any contact with you once you terminate - that is just wrong. If you feel strong enoigh, you may want to tell him that you don't want him to contact you any further. If he still does, he could get in trouble and you could report him. Not that you would, but it's unethical on his part. If you feel strong enough, you could block his number so he can't reach you.