We've been together since april 8,2016 what's in store for us n the future？

His bday is 3-2-82 & mine is 12-17-90. we've been 2gether since 4-8-16 things r good we argue sometimes but get over it im falling in love with him & he with me so he says us there marriage and children for us n the future. Will we last for eternity?