when you start doubting his/her fidelity ,do you still have the same love?

Nope.

I've been cheated on by at least 3 of my past lovers (that I know of). Each time, the moment I started to suspect it, my feelings for them immediately started to fade. And then once I found it to be true without a doubt, my feelings for them went away instantly.

I think it's a blessing that I am not one to cling to feelings for a person once I have been wronged by them.

It’s getting shaky.

I would think so that's probably why you get hurt and angry.
Otherwise, wasn't much love there to begin with.
But, eventually you have too move on.

No, time to move on and find someone who understands how to be trustworthy and loyal.

I would say probably not