Would you got a concert without your husband

My niece wants me to got a concert with her, we would most likely get standing room tickets since it's honestly cheaper. When I told my husband about it he was shocked I would even ask to go without him. We have always done everything together. Concerts are our things to do together especially, and he knows I've been wanting to go to this one. So I understand it kind of hurt him that I'd want to go without him. But it's also nothing personal, I'm a sahm who is trying to find myself again and I'd love to just go out and let loose with another girl. I love my husband to death, and wouldn't let loose in a way jeopardize our marriage. I just want to enjoy myself as myself. At first he was like "no! We don't do that stuff without each other" and how he wouldn't trust other guys around myself and my niece especially in standing room. But I'm not worried about it. I can handle my own and protect my niece who is 21 its not like shes a child. It's not the first time I'd be doing standing room at this same type of venue either. I jokingly told him how it was ok for him to go to the strip club with friends when we first got married, but I'm not allowed to do this?! Which I don't care at all that he did it was just a joke, but i mean its true. And he finally said fine I could go if I want to.

But now as I just bought the tickets, I feel weird. Is it ok for a married woman to go out and do this kind of thing without her husband? I mean I'm sure many woman do. I just feel weird cause my husband is right... We've always done concerts together.

My husband and I have very healthy relationship. We don't see each other as "keepers" or any sort of personal belongings. We are literally best friends and do everything together by choice. We also got married very young and when he was in the Army it was just the two of us for a very long time. So thats what we are use to. He knows I've been struggling with myself having a lost identity ever since having kids. And he helps me in every way he can. So he knows it's good for me to go out on my own and even encourages it more than I do. I just don't think he was expecting something like this lol. It's not that he won't let me or anything crazy like that, it's just we love going to concerts. And we've only ever done them together because we both enjoy that together. But I am still going to go! I just feel weird about it is all.