You had two weeks together in person and then communicated for a few months prior to marrying. When you married, you had more time together. That's pretty normal for an international relationship. Nobody cares if it seems rushed in this context. Don't open the can of worms of carrying on a long distance relationship while she was in a committed relationship. No reason to mention the other guy at all. They weren't married, and your real relationship started after than one ended. You have plenty of evidence, to get the I-130 approved, and you'll have more between now and the visa interview.