Tantrum Time

Help! Tyler has recently started throwing tantrums. I don't know if it's just the age he's at or if it has something to do with the new day home we are using. I'm assuming it's just a stage. He acts like he doesn't want to be with Trevor a lot of the time, and sometimes both of us. It is really hard. Any words of advice from anyone? We seem to have lost our happy little boy for a while.