Help!!!!!!

laycee

I just went on my bf’s Instagram just to check up on him and I see he’s made a whole account where the username is a bunch of random letters and there’s no followers or following no dm’s but as soon as I type in a letter in the search his ex’s name pops up on the very top… I’m so confused and frustrated. Did he make the account to keep tabs on her or should I be worried that something deeper is going on…just some back story they were each other’s first love and he always talks so bad about her…