Real love isn't one sided or happens instantly but it takes time to grow. The instant thing is called attraction that might go with time. However, if the instant instinct takes time to know each other, accept each other's flaws, it might convert into love.
It might take a few months or years to develop that level of love, understanding, acceptance. In other worlds, it grows with time and strengthens with passing events so give yourself time to know your real feelings.