I'm pregnant, but I don't know who the father is.

My boyfriend and I have been together for three years. We live together and are planning to get married once we save up enough money and I finish school. He's away for training with the military, and I took a trip to see my best friend. We hadn't seen each other in years, so it was great! I didn't think anything of it when he hugged me and gave me a kiss on the cheek when he dropped me off at the airport to leave. It wasn't until 2 days ago that I got a positive pregnancy test.<br><br>3 months ago, my best friend was going through a really rough patch in his life. His mom had just passed away, and he was really lonely and upset. I spent the night with him at his place to keep him company. And I don't know how it happened, we hadn't been intimate in years and had no intentions of being together. I was just there as a friend. But we hooked up, and we both knew in the moment it was wrong, but neither of us cared. It wasn't until the next morning that I began to panic. I felt guilty as well as stupid, and I really didn't know what to do.<br><br>So I got a pregnancy test, and it's positive. My boyfriend is due back in a couple weeks, and I have no idea what to do. I want to believe this is all just a coincidence and the baby is my boyfriend's, but I know in my heart that isn't true. 2 days ago my best friend wrote to say his girlfriend is pregnant. She's been trying for a long time, and I'm genuinely happy for them both. We've been friends since high school, and I don't want to ruin his life. But I really don't know what to do.<br><br>My best option at this point is to pretend this never happened, but I can't bring myself to do it. My boyfriend will be so upset when he finds out, and I don't think he'll be able to let it go. He's not the most forgiving person, and I don't know if he'll be able to forgive me. But I don't know if I can bring myself to abort. It's too late for the morning after pill, and I've already begun to feel a connection to the baby. I'm really torn, and what's worse is I have no one else I can trust with this secret.