I went through something similar. I don't regret but I do feel bad I lost some feeling but that is normal sometimes it happens or the other way around but that is the responsible way to do it because you can't force/ fake your feeling because if you fake it further along you will hurt their feeling even more so the best way for them and for you is when you realized you have a different feeling tell them honestly or else you are wasting their time unfortunately.... I know this is hard because I went through it as well but I hope you are doing better <3 don't feel bad about yourself (I know this is hard but don't blame yourself :)