Should I wait for him to reverse vasectomy or find another way?

My man and I have not been dating long, three months, but we have known each other for over 20 years. He told me he had a vasectomy 4 - 5 years ago, because his now ex wife didn't want kids. I told him I wanted kids and he immediately offered up getting his reversed. He also has brought up marriage, but in kind of a joking way, like let's go to Vegas, we could do this and this and get married. I don't think it's cute. But anyways, I told him the kids thing was really important to me and he says he can't afford the reversal right now...

I'm not sure if I should move on, vasectomy reversal cases have a lot of failures and issues on their own. I'm also worried that sperm donation would be expensive and cause rifts between me and him. Also, I'm really very depressed that I can't have all that fun baby making sex.

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