This Story Is Sad, its hard to get over it?

My former close uncle is mad at my mom and dad for no reason. Ever since i was a baby we`ve been close to him, but because of he`s girlfriend, she doesn`t want him to spend time with us anymore. One day he want me to see Morgan he`s cute golden retriever, i`m so emotionally attached to, he started to say, your mom is just like her father, and he wants my mom and I to be perfect around them. It doesn't make sense, - when i was at his house he hardly let me spend anytime with Morgan he just kept going on how, he`s sad that years years ago he`s x gf cheated on him, and he wanted to marry her, but they broke up but what does this have to do with me all i want is just to see Morgan. The gf was talking to my mom on the phone and said if (my name) was my niece i would have told her off, cuz shes was mean to me, and i actually didn`t do anything wrong, when my uncle was saying all the mean stuff about my mother i cried and yelled at him, cuz i love my mom, and no one can change that. he promised i could see morgan again, without being friends with he`s gf now he said an email, to my parents i have to be her friend in order to see him, hes a lier, he broke hes promise, you know he talks to his friend but not hes own niece, it breaks my heart i didnt do a single mean thing to him, and now there getting married but shes forced him to, shes like i want a ring bla bla bla, and i told him hes being forced into marriage he couldnt say a word but ya kinda. Morgan means the world to me, i miss him so much. His gf has hurt my family and me! my uncle and gf are just selfish people, and im trying to get over it for my mothers sake, but its hard what do i do ? my mom believes that my uncle emotionally abused me, am grateful that i get to treasure the moments i had with Morgan.