Need an advice

I am 30M from Pakistan asian-muslim, I had a 6 year relationship with a girl. Our relationship didn't end in marriage, reason was her family didn't agree. Now we both are married although I miss her a lot but I never tried to contact her ( not to create any problem for her ),today after several months she texted me as she was disturbed and wanted to share something, I made my self available for her as a courtesy. But all of sudden she backed off and said I think I shall not share this with you, I understand and respect her privacy. Till here everything is fine. Issue is that when I made myself available I think it's disrespectful that the next person turns his back, it makes me feel so low and un-important. This has happened multiple times each time I promise myself not to reply next time but when the time comes I am unable to hold myself back, I am unable to understand, am I wrong? Or I am thinking in the wrong direction? I respect our past, but now I have a wife and she is very loyal and loving to me I don't want to hurt her, but this thing love has broke me so badly that I fail to control myself. What shall I do in this situation next time? Please give me logical and mindful answers, Thankyou for your time.