I'm sorry to hear about your dilemma.
I haven't experienced what you're experiencing yet in regards to my animals. My significant other is rather supportive of my reptile keeping and other pets. But I guess he expected it since I'm an Animal Biologist Pre-vet. And he is also aware that I put a strict limit cap on the number of animals I own. He knows I'm not going to go hoarder status or something... haha.
If your boyfriend doesn't enjoy your reptiles anymore, perhaps just let him be and have him interact with them on his own. If he wants to hold them, he would go get them himself. (It's his loss in the end)
And that comment by your boyfriend's family member bugs me. Why is it their business? Why do they care? It's your animals. You enjoy them. They make you happy. That's all that should matter.
Maybe come up w/ a compromise with your boyfriend. Tell him you have been waiting YEARS for this pied. This will be your last pet (for now ;D).