it's OK to feel yuck if you do things to change it the next time
so
if being with someone who gives you butterflies makes you feel yuck because you don't think they feel that way about you then stop putting your thoughts in their head and stop worrying about how they feel and enjoy the butterflies
because being in the presence of my philosophy professor from college still gives me butterflies he is married i am with Cori I don't want to be in a relationship with him but I sure like those butterflies.... they remind me that I am alive