When you think about it, a sign of so extreme affection and love from an extremely introvert and afraid of everything girl is something heartwarming. She's fighting back against her anxiety, fears and everything other that otherwise blocks her from even looking into other people's direction just to make that guy feel good.
Personaly on his place i would hug her thightly after that, ask if she can wait for a moment and RUSH WITH THE SPEED OF LIGHT to buy wedding ring. This is maybe just a random BJ picture but if one know the character doing it then probably they can imagine how serious it is.