It is important to remember that every man is individual, and what may interest one may not necessarily suit another. Ultimately, the most important thing is to be yourself and build relationships based on mutual respect and understanding.
Not receiving calls or messages from a man can have various reasons, and the exact meaning depends on the context and the relationship between you. Perhaps he has personal or professional responsibilities that distract him from communication. It may also be that he is not experiencing the same level of interest or involvement as before. The best way to find out the reason is to contact him directly and ask an open and honest question about his absence.
Find out more about his hobbies, interests and support him in them. Be interested in his life and show him that you want what's best for him. Pay attention to your appearance and style. Wear what highlights your individuality and makes you comfortable. Take care of yourself to look fresh and attractive.
You need to communicate with guys the same way as with any other person - with respect and mutual understanding. Try not to ask unpleasant questions or criticize his appearance or past relationships. Show interest in his hobbies and opinions, do not hesitate to ask questions on various topics. Be friendly and open, but don't impose your opinion. And remember that every person is unique, so communication with each guy may be different.