Husband can't/won't stay with the kids for a weekend.

I have two kids, 4F and a 8 months old boy. My husband has never spent more than an hour with the new baby alone. He has only changed his diaper one time in the 8 months. I have been living abroad in his home country for two years and it has taken a toll on me. I'm tired from having two kiddos and I haven't had a girl's night since before my first was born 4 years ago. My best friend lives in another state and is inviting me to a much needed girls trip. I have never had a night away from the kids, or even half a day away from the kids. I got my hair cut once and had to bring my mom and the baby so I could go. While my husband has been on many overnight trips without us. For work and for fun. I asked my mom if she could help him for the three days I would be gone and my husband said it's "a stretch" and I shouldn't leave a baby alone because I am the main caretaker. I just want a night out with my friends that I haven't had it almost 5 years. I'm stressed, tired, and over worked. I work from home and take care of the kids 100% of the time. Am I wrong for wanting to leave the kids with him and my mom for 3 days to fly to see my best friend? Ais this unreasonable? I don't think so but I need some reassurance from other moms.