Is it just stress or depression?

I love my boyfriend so much and just last week everything was ok. It still is ok but not me. I've had a tough week dealing with depression and insecurities. The past two times I saw my boyfriend, I have cried during sex. The last time, he said I love you like he always does while we're doing it, but this time it made me cry. The first time he didn't have to say it to make me cry, just being intimate and knowing that he really does love me made me cry. I thought they were happy tears because I was happy, but felt really sad too. I'm thinking maybe it's just because i had dealt with a lot the past week and it just felt amazing being with him. He is the person I go to when I'm down and he comforts me so maybe it is just me finally being able to fully let it out. But a part of me is scared that maybe it's a sign that I'm falling out of love? Without really knowing it? I still feel that I really love and care for him, we've been together for over a year. Please help, I am sure I am just overthinking something that's not true, but I am hoping someone could ease it up. I haven't felt all of my feelings for him as much as I usually do and I am worried that maybe I am actually loosing feelings for I am just not emotionally attached at the moment from all the stress. I really miss him because I don't get to see him as often anymore and maybe I'm just trying to not miss him? Idk