Confusing Feelings?

Ive been with my boyfriend for a year now and through my anxiety hes been amazing. Recently since starting school again Ive been feeling stressed, tired, ill and unmotivated. Other than that I dont have much feeling. Kissing my boyfriend isnt butterflies, cuddling is great but even when I go to sleep I dont feel the relaxed feeling to go to sleep. I know I love him I just need to figure out how to get out of this slump. Ive told him how Ive been feeling and he's now worried Im losing feelings for him which makes me more stressed. I dont want to lose feelings for him. How do I make this better without breaking up?