normally yes but I will also ask how old are you. It is because if the girl is 35 and the guy is only 20, then this may be an issue not because of age.
Normally people mindset change rapidly after they worked. If both of you still studying, then I will say No.
If both of you working for a while and being mature enough, then I do not see any problem.
I think I need to highlight to you. Are you thinking he is your Mr. right and he also got the thinking of settle down (getting married)? It is because if you thinking of getting married soon but he is not prepare for that..... I do not see this relationship will be fruitful because expectation is too differences....