My little brother thinks I don't smile

Hi, so for some background I've been the legal guardian of my little brother for about 3 years now. I live with my boyfriend of 5 years. My dad basically dumped my brother off on our doorstep when he was 7 to "go find himself", he's 10 now. I'm 26 and so I've graduated and found a good paying job for myself but it's been an adjustment, to say the least. it's been stressful and I've probably lost a good 8-10 years of my life from the anxiety of the situation. My boyfriend has been completely supportive and loving through all this and treats my little brother as his own. Since my boyfriend works as a 1st-grade teacher he gets home about the same time as my brother so they hang out and play together a lot.Yesterday my brother went to his first counseling appointment due to some behavioral issues and the crappy situation (we couldn't get him in sooner due to financial issues, the high school counselor offered to stay late and work with him). One of the things he did was draw a picture of "his family". He drew himself with me and my boyfriend, overall really adorable and relieving to know he thinks of us as his family too. But, he drew himself and boyfriend smiling, while I was frowning. When the counselor asked why he said "because he [me] never smiles, he's always sad or upset. [my name] tells me not to lie, I'd be lying if I drew him smiling." Guys, I felt like I got punched in the gut when the counselor told me that. I've been stressed financially and (as my first post on this account mentions) lately, my brother's been attached at my hip and will climb into bed with us. I'm a very very light sleeper and it takes me forever to fall asleep in the first place so I've been going on little sleep for about the past year and a half. I'd tried to hide the strain from my brother but obviously not very well as he picked up on it. How do I train myself to smile more when he's around? Should I take this to heart or is this just one of those things that kids say? I don't want to be that stick figure that frowns all the time. via /r/Parenting https://ift.tt/2IOCIc4