@Cella,
You have my sympathy. Such relationships, particularly shorter ones, are a tad easier to overcome than ones that last years. I wish you good luck and good energy to overcome this pain. Sometimes, after a while, you remember more of the good than the bad...more than is realistic or wise.
Try not to think of this in terms of defeat or failure. That attitude won't help you to where you need to be. Every relationship even the ones that end painfully or too soon...unfinished...has the potential of teaching us valuable lessons. Sometimes the lessons can cause us more pain than we'd like. Or they can open our eyes to areas in which we need to grow
Even though you weren't intending the drama, the drama is inherent in contacting each other...being in touch can stir up intensity..that for one person or both ...might be best left alone so as to heal over. This drama can follow along like a shadow. Best to just let time heal. IMHO, in some cases, closure can be way over-rated, frankly.
If you're still in this new relationship, enjoy it and work on it. The past, in this case, might be best to remain in the past. Work on your job if you have one, family time, or creative project. Try to fill your time so that you don't have time to dwell on the past.
This advice happens to be coming from a man who is still in touch with my ex (never married) of 5 years, 1999-2004. We've been in touch for the last 11 years. We both have had long term relationships since we lived together. In fact, this same woman re-married her former ex-hubby.
Life can take funny twists and turns.