So, my highschool sweet heart and i have been together for 5 long years. Last Thursday I ended the relationship due to my best friend messaging me informing me that he made her uncomfortable by walking with her side by side with his hand on her waist. Not once but twice.
Ex boyfriend says that I'm blowing this out of portion and that he "i unthinkingly lead (friends name) by the waist while making fun of his best friend for not going into a Anime store'

He apologized for making my friend uncomfortable, but hr never apologized to me, he still hasn't. I asked 3 people for their opinion of this situation before I confronted him. When i spoke to him on the phone, he told me "she is short and that's were my hand fell" my ex boyfriend is 5'11 and she's 5'2..

Am I the asshole for ending it? 