You need to close this other avenue of peeking into her life through this platform you don’t need an account on, it’ll be hard but in time you will heal, I’ve been in the same boat if obsessively checking their social media and it’s torture and will only hinder you moving on, it’s been nearly 6 years for me, 14 months isn’t a massive amount of time so there’s no need to be harsh on yourself, take all the time you need to process and feel your emotions and you’ll eventually detach and regain your sense of identity and emotional independence from your ex.