Most Helpful Guy
He chose to be with you didn't he? You didn't know he was rich, but he knew. I'm sure he knew you weren't rich also. He still CHOSE to be with you. Don't forget that.
Is it really the money you are concerned about? Or is it about different social standing and feeling you don't know how to act in a different social strata? Are you afraid of a faux pas? Are you afraid that you might do something "lower class" and embarrass yourself?
Just be yourself. Remember that you were with him for seven months and you didn't know he was rich. Doesn't that mean he didn't fit some stereotype that you had about rich people? Obviously he's not like the stereotype you imagined. Not all rich people are snobby elites who look down their noses on anyone who is not rich.
He CHOSE you and wants to be with you. He might have intentionally hid his wealth to find out if you were after him or his money. If he did that, it seems you passed the test. He wanted to be with you, and you wanted to be with him, not his money. Isn't that enough?