i think what makes me love timepetals sm is that they're so clearly in love with each other. their love is always on display; it's tangible and undeniable. every action they take is taken hand in hand and they are each other's suns and they helplessly revolve around the other. they're lost in their own little world as they fall deeper and deeper in love. we are witnessing a love story with all its twists and turns. they are always at the precipice, ready to fall together, but they never jump off the ledge. for as much love as they feel for each other, there is twice as much they hold back for fear of changing something that is already good. it could get better, yes, but it could also get worse and so they stay quiet until rose decides that he deserves to know, that if this is going to be their goodbye, she's going to tell him what has always been so obviously there. and the doctor knows, has always known but the words can't leave him and they never do. at least not until he becomes something even more made for her and suddenly there is nothing holding him back because now there is no bleak future without rose tyler looming over him because his entire future belongs to and with her now. he is who he is because of her and that will always stay the same because they can share a forever together.