Not too many people are aware of your relationship
Whether this is you or your partner, but you know that there are not too many people whom you have informed about your relationship. Your partner may also be unwilling to tell his friends or family members about your presence in his life. It does not matter if one of you or both do not feel like revealing much about your bond. Here the point is that if either of you does not want to tell others anything, it means that you feel embarrassed or even ashamed of your bond. It is unpleasant to see that your partner does not feel comfortable to post your pictures on his Facebook account when you are happy to do so. You cannot be happy in such a relationship. Neither can your partner. You deserve something better and more fulfilling.

Communication is initiated by only one of you
Your couple cannot be perfect if communication matters to just one of you. Both partners are supposed to be willing to initiate discussions and talks. One of you might be less talkative and this might be his or her nature. But this is something absolutely different and cannot be compared to indifference. Do not ignore this sign and reconsider your relationship. Think well and decide if you are ready to continue.