How do I avoid someone who broke me but at the same time made me the happiest person?

Hello! Thank you for this question. I'm sorry to hear that this person made you feel broken in some way. It doesn't seem as if things were clarified very well regarding friendship versus a more intimate relationship. 

To answer how to "avoid" this friend I would recommend limiting social media or any chance of running into each other in public just for some time as you work towards healing. This can look different depending on your situation. For example muting their stories or even going as far as unfriending, restricting, or you taking some time off of social media.

If there are chances of running into them in public, find creative ways to change the time you leave or places you frequent.  If you have mutual friends setting boundaries would be helpful so that people don't spread information to them or back to you if it's too painful to discuss with others right now.

Something I would encourage though is not "avoiding" them but learning how to heal for yourself. In avoiding you actually do the opposite.. what you resist persists. There is a saying based on a book that your word is your wand. Meaning that we create our lives and experiences based on our thoughts and words. Based on some of the word choices in this question, are there other ways you could practice painting your life? When you explain that someone broke you, you produce a strong negative emotional charge. It's tough in the moment and I don't mean to invalidate in any way. I think you should honor your feelings and take time to process the events. Then start thinking and speaking a new way of being into existence. In a limitless world in which your success is guaranteed, what would you want? What life would you call in? What people do you want around you? Etc.

If this person did make you happy as well can you hold that emotional charge longer than any of the negatives? At least until you can do more self reflection and healing?

I hope this was helpful. Please feel free to reach out if you require any further clarification, assistance, or strategies in processing or moving towards healing. Wishing you the best.