<human>: Can you summarize the given text in a few sentences?

Throwaway account for several reasons. My current SO and I were childhood friends, but lost contact for about 11 years. We found each other late 2010, and have built up a friendship since then. Fast forward to August 2014, we made a phone call that lasted the whole night, and that call was what made me interested in him as more of a friend. We then agreed to meet later that month, which became a weekly thing of us to meet each other, and then it would become twice or three times a week. We have exchanged intimate gestures during these meetings.

The next month was what really broke me. I found out that he already had a girlfriend of one year. That day, his then girlfriend texted me, asking how long I've been together with him. I guess she found out first, confronted him, then asked me for clarification. After this incident, I threatened to cut off all contacts with him, but I just couldn't. A part of me wanted him to stay. I still kept contact with him, about how this is going to work, and what we were going to do. He asked for a week to sort things out.

A week later, he told me that he had broken up with his then-girlfriend. Since that day, our relationship has gotten better and better, but deep down, I still feel very bad for causing them to break up. Am I a "homewrecker"? Do I have to feel this guilt? I am scared that I might use this as a "weapon" when we get into arguments.
<bot>: Started a relationship with a childhood friend. A month into the relationship, found out he had a girlfriend. He dumped his then-girlfriend for me. Am I a homewrecker?