Brother touched me, he said if I told my parents he would hurt me

Okay so I'm 13 and my brother is 15 I walked in on him shaving his pelvic area and I asked him if I could try and he said sure he told me to close the door and drop my pants so I close the door and pull down my pants but left my boxers on and she laughed and told me I had to take them off I told him I wanted to try alone but he said I would cut myself so I dropped my boxers and he looked straight up at me and started to chuckle and asked why I had never shave down there before after he finished shaving his hairs he buzz cut mineand then wet my pelvic area and begin putting shaving cream on it and I got a mild erection and he smiled he grabbed the razor and started shaving my pelvic hairs after he was done I had a full erection and he told me to sit down on the toilet he started to jerk me off and I grabbed his hands and told him to stop he told me that it was okay I let go and he continued until I was finished then he shut down and I did himlater that night when we ate dinner it was so awkward because nobody would talk I don't know why after we finish dinner I went in my room with a soda and accidentally spilled it on my bed so since we sleep in the same room I was told to sleep in his bed after he got in and shut off the lights he started to grab my penis and play with it and then he told me to suck his and I told him No he said if I told my parents he would hurt mewhat do I do? Do I tell on him? Do I let this continue? I'm so lost.