How can I stop my jealousy?

Okay so my mom does things that makes me feel unwanted. She sent her boyfriend pictures of new hairstyles she wanted to try out and she didn't ask me. He's not a girl he can't tell you if he would wear it or not, he can't tell you if those jeans you where wearing are in style. He can't take my place and I dont like him! He's not my biological father he's my mom's boyfriend. My real dad is about ... 15 minutes away and my real dad and my mom's boyfriend provides for me but my mom's b.f does more. I say thanks but I really feel guilty cause he adores me but I can't stand him. He's probably plays bingo with my granny he's like 60 something and my mom is 45 she want's a mature relationship and I think I disaprove because he's way older and he can act like an *** and he talks with sarcasim. I can't stand him because he is so freakin annoying but I feel guilty when he helps me out. I am also sorry this is so long.