What can I do to make me happy agine?

Yesterday my family fell apart,I came home from school and my big brother was packing for somthing, and his friends asked are you sad hes leaving, and I figured it out he was moving out, and I didnt even know him and my mom dont get along at all, they got in a fight right befor he left over his class ring,so I hugged him goodbye and I noticed he started to cry so he let go, I went in my room because I started to cry but I opend the door to go to the bathroom and he hugged me agine I asked when im going to see him, and he said probably not fo a while. I love my brother more then any other family member, I stoped talking to my dad about a year ago and me and my mom dont get along so I dont really have any family member, but after he left he texted me this : I love you amber, and dont forget that I know how stressful things are ang how much they suck, and my biggest regret is leaving you there alone. I didnt know what to say so I just asked him were he was going and what his plan is but, hes going to chicago about an hour or 2 away and im not getting my lisence for 3 years and not coming home to see my mom, and he got a job and some expensive store and hes living in his friends apt., that night I went to a therapist, she didnt really help and when I got home I cried till in the morning, and I even stayed home from school because I was afraid I would bust out crying in class, I dont know what to do, I havnt been happy, and I honestly dont know how to be at this point, what should I do?