The guy is very clear — At this time he cannot marry you, he might change his mind in future, but clearly not now.
Another thing, he will NOT change his mind because “you” want it, he will change when he will really feel an urgency or a need to change. There is no need to unnecessarily pressurize him and stress yourself over this.
Now its upto you, if you think its important to get married in love then please find yourself another guy who thinks the same way you think.
On another note – Love has little to do with marriage. Love is more about freedom, joy and celebration, but marriage is more or less a legal structure and comes with responsibilities and social obligations (but not necessarily love and happiness).