Sad he's traveling alone

This will be the first time in our 4 year relationship my boyfriend will be traveling to another state alone. His cousin is getting married and I'm pregnant and will be too far along to go with. I'm upset he will be going without me and also worried about him leaving so close to my due date but its family so I understand why. He obviously wants me to go but in our current situation but I can't. It still makes me sad he is leaving without me but I don't want to ruin his trip so any advice on how to, I dont know, get over it? I don't work and I don't have any friends that I can spend time with while he's gone so I'm kind of at a stand still. Is it normal for me to feel hurt about this or are my pregnancy hormones turning me into a butthead? 😥