What does it mean when a guy says he doesn’t want to lose my friendship?

Usually it means he likes the relationship exactly as it is friends only, NO romance or dating.

One dictionary defines “acquaintance” as “a person with whom one has had some social contact but for whom one has no strong personal attachment.” It indicates “less familiarity, closeness, fellowship, and well-wishing than FRIEND
As regards trust, affection, respect, and loyalty, friendship demands a higher degree of responsibility than acquaintanceship does. He who asks for friendship with, as it were, no strings attached, in reality wants only an acquaintance, not a friend. Close friends are happy to fulfill the responsibilities entailed by a strong personal attachment, realizing that these give them an opportunity to prove their friendship.
This type of friendship with " no attachment" would include no attachment emotionally or physically. Safeguard your heart.
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