12 constellation is the most suitable constellation pairing for girlfriends.

Here are some constellation pairs suitable for girlfriends:

1. Virgo and Aquarius: These two constellations have great differences in personality, but they can complement each other well. Virgo pays attention to details and rules, while Aquarius is more open and free. This combination can make each other more fresh and exciting.

2. Libra and Scorpio: These two constellations have mild personalities, but their personalities and values are somewhat different. Libra is more rational and calm, Scorpio is more emotional and enthusiastic. This combination can make each other have more mutual understanding and support.

3. Leo and Taurus: These two constellations are confident and independent, but their personalities and interests are somewhat different. Leo is more enthusiastic and open, Taurus is more stable and restrained. This combination can make each other appreciate and encourage each other more.

4. Gemini and Sagittarius: These two constellations are smart and flexible, but there are some differences in personality and behavior. Gemini is witty and changeable, and Sagittarius is straightforward and frank. This combination can give each other more mutual inspiration and support.

Of course, the constellation pairing between girlfriends is not absolute, but also needs to be comprehensively considered according to personal personality, interests and values.