need advice

some time back i cut ties with this friend of mine. i was struggling a lot from my problems. and i would rant to her. we talked to each other almost everyday. but then i felt like i was being a burden to her bc of my constant ranting. i did care for her. she was a friend of mine after all. but my own problems got the best of me and i ultimately decided to leave her. i left her telling to take care of herself and that i must go. after that there was nothing. now i regret my actions. contemplating whether it was the right choice. i know i am a horrible person from what i have done. should i have made a proper closure to her or is it best to leave things this way?