Always have your own MONEY.
Don’t place yourself in a position where you are financially dependent on him because if you need to leave, it will be hard to do.
And just because you have your own money does not mean that you have to go 50/50 on everything. You aren’t his “buddy”.
A real gentleman interested in you would never expect you to always go 50/50.
Oh…and never put all your money in a joint bank account with him. I could tell you a few stories…