I need advice pleaaaasssseee!!! or more like someone tell me to get over it😅. So, i married my…

I need advice pleaaaasssseee!!! or more like someone tell me to get over it😅. So, i married my husband a year ago.. got pregnant right after and we have a beautiful 6 month old baby girl. I've been with my husband since high school so its been like 5 years. I've always been in love with him & hes been my best friend since day 1. Well he has a brother that is the same age as me. Theyre only a year or so apart but when i first met him i thought he was an ass.. he was good looking, but just very different from my husband. My husband was always the good kid and still is and the brother is opposite. He doesn't get in trouble with the law or anything like that but he definitely lives on the edge. Like a year and a half ago i got my friend to start talking to him and she would read me conversations of theirs and he was literally the sweetest. My friend fucked him over and after that he hasnt had a gf or anything steady. Wellllll i feel like ive been obsessed with him for a while. One day a while ago my mother in law said my name and my brother in laws name together on accident and she was like i always want to say erica & nick instead! Ive thought for a while that me and my brother in law have alot in common. He has the humor of sarcastic like and thats how i am. We both like to have fun and go out whereas my husband doesnt. Not that its a big deal, but just an example. But then again me amd my husband feel like we are the same too. Its confusing. I feel like if my broinlaw was the dad of my baby then he would be in love bevause hes so good with kids. My husband loves our daughter but he had a hard time showing emotions. He dont know how to talk to babies so when he talks to her it's like weird sometimes lol. i find myself getting aggrivated if he likes other girls pictures and shit. This week he got a girlfriend that i know is just going to do him wrong but they act in love. And ive stressed myself out over it. Hes so cute and doesnt deserve the things hes been thru with relationships. Im just like... how can a girl not want you and be faithful? Then I realize im that girl doing that to my husband. Granted ive never ever cheated or even looked at another guy except his dang brother. Its sad that i KNOW we could never be together, yet i still keep update on him like we are together. Someone help me get over this.. ugh. I hate myself for it alot!