A man in his forties said that he wanted to be friends with me. Brother-sister relationship was what he meant, and he asked for clarification.
It's up to you. For a 40-year-old man, his other half has lost his youth. He wants to find passion, he will give you material things. But when you depend on him, he will kick you away. He can't stay on one person. Of course, it does not rule out that he really wants to make friends with you, but the chances are relatively small. After all, few men and women in the world are pure beings.