It makes me sad

I know I have not been here in awhile but I will be here more now. I really need to vent about something and my friends probably don't understand it. Okay I was in contact with someone I was going to buy a puppy from and I started finding out different stuff about them.I even defended them when all sorts of allegations were brought against them. Well the puppy was going to be gift to me and the person who was going to buy him decided not too because they did their own research ad felt that someone who is not showing their dogs should not charge so much and also the prices kept goig up and down. Anyway I went through the heartbreak of explaning and she understood and told me even if I do not get a puppy from here she would always be my friend. I told her a lot of things that happen to me when I was young and she went through the same and was giving me advice.Y Well long story short, now when I say things to her she doesn't say much back and It makes me sad. I am a very sensitive person. I just don't understand why someone who was suppose to be my friend would treat me this way? Sorry if this vent may sound stupid