Need advice ☹️

So I've been with this guy for almost a year and he's a great guy. I've told him I loved him and I do, I'm just starting to get confused on what context. I've been sure of our relationship since it started, but in the past few months I have started to wonder if he's really the one or if he's just someone that I subconsciously used as a filler. It doesn't help at all that I recently met this other guy at my new job that I've started to have feelings for. I never really have time to see my bf because I have work and school back to back and am soooo tired when I'm done so I just go straight home.