Looking for advice or ways to lessen the urges

Ive been in a relationship for a while now and during a chat with him, I felt an ick with him. It's been like this for a few days now. I've discussed this with him that I've been having urges to leave the relationship or have been having negative thoughts preparing for a future that am not sure if it will happen. He has been the sweetest boy that I've been with, and I know that he won't leave. It's just that I don't understand why I keep having these urges to leave the relationship. I'm not sure if I have disorganised attachment or avoidant attachment but it's be bothering me for a while now. I want to be with him. I just hate how I have these urges, and it's been getting harder to control. These thoughts gets louder and trying to convince me that he doesn't love me or that I don't love him. At the same time the moment I don't think about him I immediately feel guilty and think more about him then I get annoyed by thinking of him yet I can't help but want him. I don't know why am like this despite knowing he wouldn't leave. Any tips?