Honda CRV 2013 beeper doesn't sound?

Whenever I lock my car now, the beeper does not make a sound, and I do not think the security system is set. What is wrong? Is there something wrong with my car alarm?

The horn doesn't beep upon locking and setting the alarm unless you purposely press the lock button twice. This gives you the "Confirmation beep". It is only a confirmation that you pressed it once already and it is already armed and locked.

Your local dealer can arm/disarm the honking/beeping by using the HDS (Honda scanner). They might charge you for it (1 hour labor)