Eep. Buddhism is dangerous – the religion considers an emptiness of the mind its ultimate spiritual goal, and Catholicism is explicitly on the other end of the spectrum, where rather than empty our minds, we seek to exist in a loving communion with Christ.
Remember that, first and foremost, each of our vocations is to holiness. This means that marriage doesn’t exist just to exist. It has its unitive and procreative functions, yes, absolutely, but underlying those two functions is a mutual prodding toward Christ and sainthood. A non-Catholic (yes, non-Catholic) will not be able to do that perfectly for you. You should seek to develop a deeply intensive prayer life, and seek someone who has that, too. You’ll know incredible joy that isn’t possible for those who don’t know Christ and the Sacraments.
And remember that there it will be incredibly difficult for you to discern marriage to someone who doesn’t have a prayer life. God hurtles – through time and space – two individuals toward each other, two beings meant to be one with each other. Make sure that God – for whatever reason – wants you to be with this one man for sure. I’m not saying it’s impossible. It may be a cross to bear, and your witness might inspire his conversion. But this will take an incredible amount of discernment. Be 2000000% sure. Don’t make this your choice. Make it Christ’s – and then follow His will.
God bless! I’ll pray for you both.