This statement emphasizes the importance of being with a partner who values and appreciates a woman's loyalty rather than making her feel foolish for it. She deserves to be with a man who won't make her look stupid for being loyal" suggests that the woman deserves a partner who respects and admires her commitment and faithfulness.
The phrase implies that a loving and supportive partner should never belittle or mock the other person's loyalty or any positive qualities they possess. The quote celebrates the idea of being in a healthy and respectful relationship where both partners uplift and support each other.