Is my stress affecting my relationship or should I really consider some things?

My feelings towards my boyfriend changed. But I'm not sure, if they did or if I'm just stressed by anything else right now.

I've always been insecure about everything. Last summer I did an internship which I loved, and I loved who I was this summer.

I met my current boyfriend during this time. We started casually as I knew I'd move away after the internship but eventually made it official a few days before I moved. This was in September.

Currently we are doing long distance. The first times we visited I felt like I did the month before, when we started seeing each other. After a while he said some things wich shocked me. He mentioned some values that I'm not sure I can tolerate.

Now I'm writing my bachelor thesis, and I'm back to how it was before the internship, totally stressed, thinking I'm a failure but not finding the motivation to get my *** done.

Then I accepted a job offer at the place where I did my internship. I was excited to tell him but the closer the "moving in together" gets the more doubt I have.

Additionally, I'm currently visiting him and his flat I totally ***, which is not his fault but also pisses me off. But I tell myself that's a factor that will change, as soon as we move into a normal flat.

Now I'm not sure if my feelings towards him are caused by my stress and everything or really because of the things he said.

Or maybe this is just the phase after being freshly in love? But how do I know if it's worth fighting through?

What do you think, any advices on how to clear my mind?