Note: The reason I don't want to do via text is because they rarely come around actually tell them in person.
Most Helpful Girl
... Actually tell them in person.
I like your style here, dear. Face to face, heart to heart, and the Honest John truth of Why... I can't do it anymore.
Explain to him the real reasons Why it isn't working for you and him and then ask him if you both just can't be friends?
This sounds like more like the light touch and... No, not like you are a monster either.
Good luck. xx