Miscarriage- afraid of telling my bf

My OB confirmed my baby's heartbeat at 6 weeks pregnant, however no heartbeat was seen on ultrasonic at 8 weeks. I still have my baby in me and am waiting for natural abortion. Btw I'm 41 yrs old. (I have no kid)

I still can't tell this miscarriage to my bf because he wants a baby so bad, and he is so happy about my pregnancy every day.

I actually had a chemical pregnancy between him two years ago and we ended up breaking up 'cause he was angry at me.

But as time passed, we started to date again, and talked about our future and baby.

Three months later we got back together, he said to me " I wanna break up with you because you cannot have a baby." ..... But we were really not "trying" to make a baby at that time. He thinks having sex can make a baby easily... but I'm already 41 and he's 38... we are not like in 20s.

We discussed again and again... then we decided to "try" hard to make a baby. I started to take prenatal vitamins, quit drinking alcohol, quite taking caffeine, check my bbt, check ovulation and go to acupuncture... then I got pregnant three months later. However, it ended up with silent miscarriage. I'm so sad and also afraid of telling it to my bf. I lost my baby and may loose him again as well.

He blames on my age.... but I still believe I can have a baby again. He cannot understand miscarriage is not my fault...

I want to try again to make a baby with him because I believe I still have a chance to get pregnant even tho I'm 41.

I'm going to tell my bf tonight since I cannot hide it anymore , and feel sad to see him being happy.

Hope our discussion goes well and he agrees to try making a baby again with me.