Trust issues

If someone who loves you constantly lies to you and you constantly put your trust into this person. Because this person really is a good person. But its the same thing over and over again. Then I always forgive but not forget and this person always makes me feel guilty like I've done something wrong. But I should be the one upset and most of all I let this person walk over me so many times. Now I'm to the point in my life I don't trust anybody. Because what this person has put me through. I just feel maybe its best if I don't associate with this person anymore for good. I feel this person takes me as a fool when I'm not. I guess too I don't like a lot of drama and just try to smooth things over.