DEAR ABBY: I’m struggling because my stepson has chosen to get married on my birthday. I have been his stepmom for 18 years. It feels like a punch in the chest. My in-law family members are saying things like “OMG, how do you feel about that? I can’t believe you’re going to let that happen. It will no longer be YOUR special day.” My feelings are deeply hurt. My husband says it’s no big deal and I shouldn’t let it bother me. But every time someone asks me about it, I feel hurt, and when I’m finally by myself, I ...