My love of my life is 67, I am aged 43. He is retired Military with a healthy military retirement check, his S.S check, and his job that he still works. I have a wonderful job that pays extremely well, legal marriage may cause financial issues for us?

I don't think it shouldn't because his retirement is from his work. I am married to a retired soldier and should he pass before I do, I get half his monthly retirement, unless I remarry. Then I get nothing. I suggest you talk to a finacial advisor though and find out for sure.