My boyfriend thinks I’m jealous of my sister and I’m not, what should I do?

My boyfriend is big on family and he’s one of those types of people who thinks meeting family is important. I don’t like introducing men to my sister because of bad experiences I’ve had with men. A long time ago I’ve dated a few guys and she has easily taken them away from me. She sees that I’m really happy with a guy and really like it and she intervenes with it. She’s done the same thing to another sister of mine. my sister is very pretty back when we were in high school and she got away with a lot of things. She was mean to me and if I would react to her in a bad way I was told it was because I was jealous of her. My family always talked highly about her in the past and she was the pretty one regardless what evil thing she did. I don’t know what they think about her now since a lot of has changed. My boyfriend met my sister and I got furious about it. I’m head over heels for this guy and I don’t want it to end. He was very confused and saw it as nothing when he met her. But after a while he’s starting to think I’m being a bully and he bets I tease and talk badly about her. I haven’t had a boyfriend in a while and don’t know if my my sister has changed but she is acting a bit fishy about meeting him. My boyfriend doesn’t see anything wrong and I can’t do anything to make him see what’s going on.

My boyfriend thinks I’m jealous of my sister and I’m not, what should I do?
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