Ask him more how he feels about it, because just from your post it sounds like it was mostly your idea but I don't know. He could be quiet for a number of reasons. Maybe he's upset that he can't father children and you'll have to get a sperm donor, or he's scared in general about the process, or doesn't actually want kids or would prefer adoption. Could be anything so you two need to have more communication.
Just a heads up because you seem young, but it can actually be a difficult and costly process to freeze eggs. People having their eggs harvested need to take fertility drugs and extra hormones beforehand. The procedures cost money and there's a yearly fee to keep the frozen eggs in storage. It would depend on your country, but I've read figures around $15,000 for the whole process.
