Hey,
I have similar problem..no spark but he is kind and gentle and would give me the world if he could.
I think that if the spark isn't there and you don't go weak in the knees then it's not going to happen later (imo)
I think that being direct about not feeling it is the best way... I know that as much as it hurts I prefer to be told things directly and I feel that others deserve it too
Best of Luck!
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How I describe myself:
Honest, caring, trustworthy, reliable and generous.