Tips for the adults life

Hello everyone, I'm Jonathan, from Brazil, 30 year old. Recently, I'm marriage with a woman who know love me with all her heart; I have a job with can pay my Bills and sustend my apartmant and help my mom's Bills; i have a family with love and help when I need. But sometimes, I feel so depress, because I work at a Company dont value me, and I study every day, graduated in mechanical enginner. I feel sometimes I deserve more, but I cant. I feel This is life, and i know I have so many things to Grateful, but I think I can do more at I do. Ps.: Sorry for the wrongs in the linguage, I'm learning and when I see This group, I fell I can practice and Tells my feelings also.