Relationship Issues....

I was 16 (I am now 17) when I got pregnant & we were only 6 months into the relationship, we’re now 1 year & 4 months & our baby is 1 month. I’ve never felt so strong about a person, I love my bf so much but lately he’s been a little distant & usually comes to my house at night but he keeps blowing me off I’m just so scared he’s with another girl that ain’t me 😢 & we do argue & get mad at each other. He’s a very sweet, caring, & loving person. He’s my best friend. I realize that I’m the problem, I am constantly accusing him of cheating on me & getting mad at him for the most stupid things. He doesn’t deserve to be treated the way I treat him he’s so sweet to me & treats me like a princess but I get jealous & mad so easily i don’t know what to do, I don’t want to lose him to my stupid jealousy & other nonsense. Any advice is appreciated, thank you! 😕