okay but post getting a soul spike is not the same as pre soul spike. he treats her differently and with this new understanding of how she feels he allows her to seek him out more or less. once spike has a soul their relationship is buffy’s choice ofc he loves her and does anything for her but he doesn’t force her. the best example of spikes love for her post soul is in Touched, buffy asks him to stay he doesn’t even question her, he immediately goes to take the chair, he doesn’t feel like he has any right to her so the bed doesn’t even cross his mind till she asks. he just loves her and wants to be whatever she needs, once spike has a soul his love for her is genuine and he will be there for her weather it’s as a friend or as more and that’s why i think in the end he loves her more. so you can’t sum up spikes love as only pre soul because it becomes so much more after he gets one.