how should i feel?

so in talkin with my ex boyfriend hes now saying that he wants to come down the weekend of my birthday and how would i react to seeing him and honestly i dont know how to react to someone who i havent seen in a year and some change and also to the person who knows how to hurt me the most....i mean of course ima still have feelings for him but there is still alot of hurt and even somewhere some hatred or shall i say strong dislike....like recently we have started talkin again and actually having decent conversations but in the back of my head i know it is only for a period of time b/c everything will go right back to being normal which is constant yelling....so he wants me to be excited about seeing him which i know somewhere i probably am but i know that once i do see him it probably wont be the normal reaction u would give someone who u havent seen in a long time b/c he knows everything that we have gone through....so how should i react?