Do I still love him...or just going with flow?

I've been dating my boyfriend for a little over three years now. He has always been supportive and nothing less than amazing. His family is great ect. Recently I have noticed that I am very short with him and I get mad easily because he didn't do what I "imagined". He also has been short with me too. He always walks me out to my car, and today when I left he didn't. I know this all sounds so silly and teenage-ish, but I don't know what it's like to fall out of love with someone and I don't know what it's like to just have a steady relationship and this is normal.

Here are also some factors:

-I am in college.

-He lives with his grandma and works in construction. He's also in the National Guard and has an interview coming up for a better job.

-We don't see each other every day.

-We don't have as much sex as he would probably like.

-I've been stressed lately with school and working.

Maybe we both just have had things on our minds and we are a little off sync. We are housesitting this week, so we will see each other everyday and night. I think after this week I'll be able to tell if I love the person who I'm sleeping next to and I do I think and maybe it's just that we've been together so long. Or maybe I'm not trying enough.

I'm so

very confused. 😭