Is it bad to feel bad about a vasectomy?

My boyfriend has 3 beautiful girls from his last marriage, and before their divorce he got a vasectomy. He and I have been dating a year, and being a women I think of having children. I have never had children, and would really like to have a baby someday. Its getting to the point that its really bothering me that he has a vasectomy and he told me he'd get it reversed but in financially situation we're in, I think it will be a long time before it could ever happen, and it tends to sadden me. Any suggestions???