Met my ex boyfriend today,any advice?

It was a reunion of our highschool batch so i know he would be there i was ready to face him and i know our highschool friends would bring up the past,i know he is still inlove with me by the way he looks at me he doesnt even hide it,he hold my hand every opportunity he has and gets touchy with me ofcourse i decline but he doesnt let up he even went outside when i was talking on the phone with someone he grabs my hand and kissed it and told me he misses me i told him i know but he has to stop how he behaves,he wants to talk to me in private as its not the right opportunity,i told him fine if its closure he wanted i will give it to him but he has to listen and i would do the same,i dont want to hurt him thats why i refuse him gently everytime he took advantage of the situation even our friends saw how much he still loves me but the thing is i saw it as an obssession because this is not the 1st time i have experienced something like this and i do know how to protect myself from someone like him but he still scares the shit outta me by how he behaves,i know love when i see it but he wants to own me in a possessive way,i promise i would talk to him personally to end this and have his closure but i dont know if i should be alone with him😣this isnt the 1st time he has done this he doesnt want to let me go even if i keep refusing him,he cant move on according to him,how much will i have to refuse him?do i need to be cruel for him to stop and move on from me?

All i know is he is a virgo i dont know his year of birth

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