Keep seeing pictures of my boyfriend with some girl

They work together and I go on facebook there's just loads of pics of them two together. In every picture she's holding on to his arm. Even when there's others in the picture she is always next to him, holding onto his arm.

It's really bothering me, there was one picture and she was sitting so close, might as well have been sitting on his lap. While she there clinging to his arm.

That bitch needs to get away from my boyfriend, there's no pictures of her with her and anyone else. They look like they are a couple.

I feel so hurt, seeing pictures like that. I've seen her flirt with him on facebook before. Starting to feel like he's going to leave me for her