Is it selfish to go?

Im just looking for some advice I have a 4 mo old and a 2 year old and recently I got invited to this concert that I’ve been wanting to go to for SO long. Its out of state and I would be gone for 2 and a half days my problem is my boyfriend doesn’t want me to go. I invited him and he said no but still didn’t want me to go. My dad said he would watch my babies but now my man made me feel guilty for even considering it. I haven’t been out in a long long time. Day in and day out I’m always with him and my kids. I would never go if I knew they weren’t going to be okay. Is it selfish if I take this opportunity? I feel like it would be a refresher for me. Me and my man never have time apart we’re always together and I’ve been feeling a little burnt out lately by the way he treats me I think maybe some space would do us good.