<human>: Summarize the given text in a few sentences.

No matter how wonderful or good looking or fun my boyfriend is I will, without a doubt, always end up losing my feelings for him within the first 6 months. I'm currently dating a 21/M who is funny, sweet as all hell, so good looking and just an all around great boyfriend. It's not even been 4 months and I just don't feel like I like him anymore. Not only that, but I get extremely critical and frankly become mean toward everything he does that bothers me. Things I used to think were cute and silly now bother me so much. This has happened with every boyfriend I've had since I started dating at 16. I just want to know if anyone else is like me and if I'm gonna stay like this. ): I just want to be happy and content with a good thing but I'm just *not*.
<bot>: Always fall out of love with every good guy I date. I don't want to be this way but it's how my brain operates. Will I ever stop being this way?