Well, if the bf is really in love with his gf, both will be
together. But the gf should tell his bf that she will help him pay
his sch fees and he still needs to pay it back as an assurance.
Base on your little info, think the bf only using gf to pay for his
fees. After that, work, then got money and got new gf, find old gf
not up to his standard and finally, bye bye to old gf. But every
outcome still lies on the bf whether he has decided and make up his
mind that he will marry gf for the things she has done for him.