is it sexual assault?

one day my phone had broke and my uncle went to get it fixed for me I didn’t know that he had gone bought my phone and found that I was speaking to a boy. Later that day my dad told me to get my uncle from his room for dinner (he was living with us). When I had gone up he told me to come in the room so I did he then proceeded to ask me questions about this boy asking if I loved him and more then he said that he could tell I was letting boys touch me because my boobs were getting bigger. After that he said if I wanted to be touched by anyone don’t go to these boys and to go to him. As I was going to leave the room he told me to kiss his cheek and I did it because I was scared he would tell my dad I was speaking to a boy (I live in a strict household) he also has pictures of me on his phone where I am wearing a vest top he said it was inappropriate and would show my dad. To this day I don’t know what to call what happened to me I haven’t found the strength to tell my parents and my uncle still comes to my house weekly after he moved out. Is it sexual assault or am I just overreacting?