I agree. Trust your guts.
I know it’s harder for some people than others, I’m very similar to you in these cases, I tend to doubt and look for any kind of excuse and looking at myself, as you, in case I could be the cause for another person behaviour.

But, said that, looking back, my guts often are showing me the best path for me, sometimes I wanted to hear them and other times, I didn’t.
But, they tend to be faithful to me.

You will find the right person.