She's totally gaslighting you. You showed plenty of interest and she started not responding just about the time this guy entered the picture - it wasn't about you.
And I agree, if she doesn't have to ovaries to just admit her ambivalence she's no use to you.
What I think you have learned though from this year is that you DO want companionship and at least a steady girlfriend. It may be time to put a little more effort into looking in the right places for the right type of woman.