It's not that he assumes you will love him regardless or anything like that. It means that he is not being fake around you. He may not feel like saying bye or hi to anyone, but feels he needs to put on that fake face to others. Not to you. So you can take it as he doesn't care enough about you to "lie" to you about what he is feeling or wants to do or you can take it as you are the only person he is being real around.

Don't take it personal. Because as much as you think you are hiding it, you're likely not. So you have to genuinely focus on knowing this is not about you and not analyze what he is doing. He is going to do crappy things because he feels crappy. So when he does, think "he must feel pretty low right now to react that way, and that's okay. I'm going to act positive because I feel positive. I'm positive because I like me and has nothing to do with the people or situations around me."

You can do it!

M38,H39
M:16Y
BD:8/12
OWDB:11/12
S:11/12-5/13
"Temp" home:6/13
OW dropped:9/13
"I love you":12/13
H ring on:2/14
Depression back:5/15
"I'm done:" 7/15
H moved out: 3/16
H moved back: 12/16
Working on us: 3/17