Your sadness is normal, would be expected during and following a family separation and relocation; if your feelings get worse or feel out of control, get help, even counseling, to help handle them. You are starting summer now: your local Recreation Department will be able to put you in touch with youth activities, camps, where parks are that have facilities that you might get active in; your new school district probably has a newsletter that may describe community activities coming up during the summer; even enrolling in summer school or summer sessions of some kind in your area would allow you to meet other kids within a structured format. Joining a church community sometimes help people meet new families and begin to feel they belong; these often have active youth groups as well.

Finally, ask your mom to set up an appointment with a new pediatrician in your area, so you can have someone to talk to about health/skin/other issues; oily skin and pimples are part of the territory with puberty, as are feelings of uneven growth. Be patient, continue to be a friend to those you've known, stay in touch about feelings with your parents, and good luck!