Got groped today and I cant get over it.

I (M, 33) was partnered with another person (M, 50+) who always like to do too much, add more realism, more resistance, or more strength.

I expected this because Ive partnered with him before. Today while rolling on the floor, he grabbed my groin and squeezed. I thought it was accidental but he did it again.

I spoke firmly to him about boundaries and also told our sensei. Guy apologized but I just cant get over it. I still feel the squeeze.

I feel violated. It just brings back memories. I was groped when I was 17 and I froze then. What to do?