How do you get friends in pet pet park

You click on the third button with the 3 blank people to the right of the Chat Bar at the bottom on the screen. After you click on the button, you will see a little blank bar with a + (plus sign) next to it, than you type in the user-name of the person that you want to be your friend, than you click on the + (plus sign) to send, than, just to confirm, click the "Yes" button to send it, but if you decide not to ask that person to be your friend you click the "No" button. If you click the "Yes" button, your request for that person being your friend will be sent. You might have to wait awhile before that person replies. Hopefully the person will click on the "Yes" button, if they do, you and that person will be friends, but if they click on the "No" button , you will not be friends, sadly.

P.S.- If you are friends person in real life, there will be a greater chance of both of you being friends.