Sagittarius: Love and Relationships
You are known for impetuosity—your mood varies from day to day, and this complicates love relationships. Although your opportunities are ample, due to your popular outgoing nature, the successful long-term relationship is quite difficult for you until you settle into middle age or so.
Your ideal mate is likely to be either Gemini (although since both of you are prone to "sample" partners in life, it's rarely a stable match), or one of your fire-sign relatives, Aries and Leo. Although at first the latter pairings may seem unlikely, due to the natural tendency of fire signs to lead, they are both compatible with you because of their innate understanding of your passions and interests.
You don't have many enemies, but in close relationships, conflicts will arise between you and Taurus (who is too possessive, and who would want to limit your freedom), Cancer (similarly, too rooted in family stability for your tastes), Virgo (too critical of you, and your pride will not stand for that), Scorpio (although physically compatible, there is too much distrust and competition for dominance on both sides), and Capricorn (too pessimistic for you).
Taken from internet:http://www.astrologyweekly.com/sun-signs/sagittarius-love-relationships.php