My girlfriends a Leo and I'm a Gemini?

We've been together 3 years and we're very happy (especially on a sexual level)

What is the compatibility of our relationship based on our signs?

Leo & Gemini
Both appreciate extravagance, dazzle, and glitter; the Air of one feeds the Fire of the other. Leo's idea of love is grandiose, and Gemini will be fascinated by the attentiveness of his partner. His (or her) curiosity is never satisfied, and the Leo is full of surprises. A helpful hint to the Gemini: be careful of the Leo's pride; don't arouse his or her ire. Helpful hints to the Leo: rein in your possessiveness, because the Gemini wants to be as free as Air. If these prerogatives are respected, love will be colorful and joyful.

Big thumbs up my friend!!!

If you both believe in that nonsense, compatibility is great.

Gemini Man & Leo Woman
This match could definitely be a recipe for lasting love if you can avoid a few pitfalls. You both love leading a glamorous social life and having lots of friends. Together, you鈥檒l be a social force to contend with! He likes going out as much as you do, and he shares your love for being at center stage in social situations. The only problem with Gemini is that he has a terrible habit of flirting with other people and he is known to sometimes be unfaithful. However, if he can control his urges and if you shower him with affection instead of jealousy, this could truly turn into a lasting love. A great match. ( Source: Jellybean's Astro-Soulmate Guide )

Leo girl is either completely head over heels with Gemini boy or he's on her last nerve. Rarely is there an in-between moment when you two team up. The good news: you'll never lack for stimulating conversation. He'll talk about climbing Mt. Fuji, but you'll be the one to actually book the tickets. (Source: FUNgirl - Astrology )