So ever since I started dating her I've had a jealousy issue. This guy has really become close to my girlfriend, and its really bugging the poo out of me. Just seeing him with her makes my stomach turn every time, and i'm really getting sick of it. I've talked to her many times about how i feel about him, and it doesn't seem to cross her mind how much it bugs me. I've been noticing that shes been paying much more attention to him at school then me. so here are the things that are bugging me. Almost everytime i'm with her at school or out in public, I notice she's texting him all the time. I've seen them walking around school by themselves and they chill at her locker all the time. the biggest problem is that they have first second and fourth period together. I purposely walk by their class to see what they're doing. everytime I walk by I see them sitting together, either with another friend or by themselves. I can tell they're always talking about something that makes them laugh, and it bugs me that I cant be there instead of him. She just doesn't understand how much it pisses me off, and yet she continues to do these things when I'm not around. I also have this strange feeling that they hang out behind my back, as they talk about hanging out soon or what they did last time they hung out. They even watched Dane cook together for gods sake. It's almost like he is her second boyfriend. It just bugs me that she never acts the way she does with him towards me. whenever she sees me she doesnt even look like shes excited to see me or anything, yet when she sees him, and a select few other people, she's her regular happy go lucky self, smiling, and yelling their name. I just dont understand her. anybody got any advice or suggestions? I feel like a selfish jerk for feeling this way. 

Edit:
user
my girlfriend is texting and hanging out with her guy friend a lot more than with
assistant
So ever since I started dating her I've had a jealousy issue. This guy has really become close to my girlfriend, and its really bugging the poo out of me. Just seeing him with her makes my stomach turn every time, and i'm really getting sick of it. I've talked to her many times about how i feel about him, and it doesn't seem to cross her mind how much it bugs me. I've been noticing that shes been paying much more attention to him at school then me. so here are the things that are bugging me. Almost everytime i'm with her at school or out in public, I notice she's texting him all the time. I've seen them walking around school by themselves and they chill at her locker all the time. the biggest problem is that they have first second and fourth period together. I purposely walk by their class to see what they're doing. everytime I walk by I see them sitting together, either with another friend or by themselves. I can tell they're always talking about something that makes them laugh, and it bugs me that I cant be there instead of him. She just doesn't understand how much it pisses me off, and yet she continues to do these things when I'm not around. I also have this strange feeling that they hang out behind my back, as they talk about hanging out soon or what they did last time they hung out. They even watched Dane cook together for gods sake. It's almost like he is her second boyfriend. It just bugs me that she never acts the way she does with him towards me. whenever she sees me she doesnt even look like shes excited to see me or anything, yet when she sees him, and a select few other people, she's her regular happy go lucky self, smiling, and yelling their name. I just dont understand her. anybody got any advice or suggestions? I feel like a selfish jerk for feeling this way. 

Edit:
user
girlfriend and her guy friends are spending way too much time together, and whenever I'm not
assistant