Yep, it is bad. I'm sorry to be the one to break it to you, but you are thAt ex gf....
The obsessed one

It's easy to get there;0 I've worn those shoes too in the past, so I'm not speaking out my a.s.s that acceptance is key, nor am I speaking from a plavce of judgement.

3 years ago I would've keyed his car

It is harassment sadly, because you are imposing your will on another, you call and text when its clearly unwelcomed and even prevented. Wether you have a history, lived together or even planned a future together is irrelevant at this point because he's no longer your bf, you no longer have the right to contact him at a whim.

You need to learn to play by today's rules, not yesterday's.

I don't think you went about moving on in an appropriate way at all actually.
Every choice you made was driven by what he would think or how he would react if he could only see you now.
(Thats if I remember your previous posts accurately. If I'm confusing with someone else, my apologies)

You didn't accept the terms of the break up either, you simply dismissed his reasoning and this lead to an inability to accept the reality of the situation, as well as your current obsession.

I sincerely think you need to re-strategize dealing witht his break up, and you need to start at the very beginning.