It sure is. I do the same thing. Even when something isnt negative I perceive it as such. And I definitely assume people are being fake when theyre nice to me or have anything nice to say. I have an over all negative view/assumption about people in general. Its even hard to believe my boyfriend when he tells me he loves me or misses me. I remember negative comments I was given as a kid by family members/friends/kids at school and all the way up til now.