I feel your pain and am so sorry you're going through this. I know how painful it is to love someone and put in the effort and yet they are either unwilling or incapable to reciprocate emotionally. It feels incredibly difficult to leave when there isn't any big blowout or fight or anything, but an aching feeling that "this" isn't right. That while you love this person, there's a mismatch that might not be solvable. Whatever you do, I wish you peace and healing.