My Univerity age son and his girlfriend alternate paying and split costs. She insists!!!!! They are both impovrished students (lol) and are careful with their money...nothing like working for it yourself to make it precious.
When my daughter goes places with her JW boyfriend, ( the very, very occasional movie) she pays for herself, and they tend to take turns buying pop or a smoothie. He was very surprised, as all the JW girls would expect the guy to pay for everything.
De...you are better off without him...but I know how hard it is...I see it at home.