Also remember everyone is different. So if you're friends say something like "we had sex all the time after we had the baby" or something but yet you don't feel ready then that's ok! Everyone is different and everyone has different reactions and needs.
After just having a baby three months ago, I can completely relate! It was extremely hard for me to want to be with my husband because my hormones were all over the place. Do NOT feel discouraged. You will eventually get back in the groove of things. Start slow and at your own pace. Make sure that you feel comfortable more than anything and do not feel guilty for not feeling certain emotions, after all you just gave birth!
Being open and honest with your partner is definitely crucial. For one they 100% deserve to know what's going on with you, and two, it helps tremendously when you eliminate that possibility of miscommunication and assumptions that happen when no words are said.