So lost

I have a 5 month old with my bf and we have been together 3 years. One day about a month ago I just lost all feelings and attractions towards him. I have no idea what’s going on but it’s breaking my heart. I’ve talked to him and told him how I’m feeling and he took us on a weekend trip to see if maybe it can bring back some sparks but he feels the love I have is gone as well. I don’t understand how I can wake up and just not want him. Has anyone experienced this? What can I do? I don’t have PPD it literally just started one day I just seen him different. He’s good to me and our baby he is a dream but I can’t even feel sexually attracted. I haven’t even used my vibrator! The one time we tried I couldn’t even finish! This is how out of it I am and I don’t understand.