I need advice

This is going to sound really sappy but I feel like I need some advice. For the longest time I’ve felt so negative. All I think is negative. I constantly feel like my boyfriend is cheating on me, which is isn’t. I have the constant urge to check on him when I know myself he’s the best guy I could have. I wear my emotions on my sleeve, and it’s something I hate but cannot help. I’m 18 and live with my parents but all they do is fight. My mom is really mean to me and I can honestly blame my household for the negativity.

This has really been affecting my relationship and I don’t want it to. I love my boyfriend with my entire heart and soul and I really need advice on how to just stay calm and tell my head to fuck off every once in a while.

me when I start thinking negatively ^^^^