DEAR ABBY: My boyfriend died unexpectedly a few months ago, and it has been a struggle to get through my sadness. We had been through a lot in the year and a half we were dating, including some infidelities on my part. Aside from my sadness and guilt, I’m struggling with the fear that I’ll never live down my infidelities or be able to make it up to him. It is clouding the positive memories I have of him. I don’t know how to stop my thoughts from going all over the place. Please help. SAD IN SACRAMENTO DEAR SAD: Much as we ...