The fact that he will not reveal any information about himself is a red flag. He has already lied to you (another red flag) and only seems interested in sex. He can only continue seeing you for sex if you continue to meet him and engage in sex.
If you want to get to know him further and he will not reveal this information to you then it’s within your power to stop seeing him. If you want to know more about him, but he does not tell you and then you meet him for sex anyway, you are in essence excusing and allowing his behavior to continue.
My sense of the situation is that if you want a different type of relationship with him, other than a sexual relationship, and he does not seem interested (i.e. continues to be secretive, lies, etc.) then it’s wise to stop seeing him, or at least stop seeing him temporarily until you can resolve this problem. No good relationship can continue functionally if it’s built on lies and mistrust. If you are not getting what you want out off the relationship you are not obligated to stay in it.
Talk to him about your concerns. If he is not interested in addressing them and seems only interested in sex, and this is not what you want, then it may be time to move on.
As a final word of advice, you should never meet with someone in person whose factual identity is unknown to you. This is not only foolish but potentially deadly. Take care.