Should I continue my "situationship"?

Hi all,
I have been friends and lovers with a person for nearly a year now. We regard ourselves as best friends and our families and friends both believe we are both dumbing down the significance of our bond for the sake of not getting hurt. 
I have, many of times, told them that I am emotionally invested in them and emotionally attracted attached to them. However, there is very little reciprocity and expression of their emotional perspective of me. They have gone above and beyond what's necessary for me to ensure my happiness and comfort, but that could simply be because they regard me as their best friend. 
With them not opening up to me about their feelings with any depth or dimension to it, should I nix my entire feelings for them beyond what is platonic and sexual? Please also note that, when I suggest I do this to them, they do not like the idea of that at all. Especially when I also consider not being sexual with them either. 

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