Dating a wealthy man?

I am 57, dating a 60 year old wealthy man. I have never had much money to speak of in my previous marriage of 37 years. While this man treats me very well, I am having a hard time dealing with some aspects of this relationship due to his wealth. His lifestyle is so different from what I have ever known. He thinks nothing of spending anywhere from $100 - as much as $300 on a dinner for the 2 of us. He has wealthy friends, who are dr's, etc and they are nice, but out of my league, so I feel like a fish out of water when among this group. Also, my boyfriend is an avid golfer and this takes up a lot of his time, as he does a lot of tournaments and even does business while golfing with clients or colleagues. We have been seeing each other for over a year now, it's a serious relationship, he desires marriage in time. I am taking this slow, and I don't know for sure if a relationship like this can work out, being that I am not college educated and have mostly been a stay at home wife and mother for the 37 year marriage I was in. My boyfriend's life is huge, with traveling and high social life and friends. I like having friends and traveling, but seems a lot of his travels are centered around his golfing and friends. This leaves me being with women who I feel I don't fit with, and not sure I can deal with this . I'm trying to, as I really am crazy about this man, but worried in the long run this relationship could fail because of extreme differences. I just need some opinions. Thank you.