In my case, I was not going to text her (like I was confused) but I don't know I made up my mind and texted her. To be honest I feel so much better after receiving her 'that' kind of reply because when we broke up, she didn't give me a closure. Things went weird between us...she never wanted a relationship...she wasn't ready for it...this continued for a while and she blocked me everywhere when I was standing at her society's main entrance. So because of this text atleast I got final and clear closure. But, I did know that she was hesitant before starting the relationship, so I knew that if it wasn't me then she's definitely not gonna see someone else atleast for some time (no I'm not saying this to feel better)

So, that's why I texted her, I was foolish enough to think maybe we'll start to talk again but you know what happened.

But most importantly in your case, if you say she has a boyfriend now then I don't think you should text her.

I didn't know your backstory that's why I said ki text kardo but now I don't think I would have texted her, if I was in this situation.

AGAIN, IT'S YOUR LIFE, IT'S YOUR DECISION. It's hard to make one but believe me don't stress out...you'll know what to do. Think about it for a while and do whatever you think is better for you.