How can I get him to stop grabbing me?

My boyfriend is the most loving kind amazing man in the world and I love him so much but today is my 20th birthday and I have been with family all day when he has been here and he his been very grabby I was raped when I was younger and he knows that but he have been very grabby and it's upsetting me and my family
How can I get him to stop grabbing me?
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