I'm going to give you a very general reading after all this is how I got started in astrology so I think I understand what you might want to know.
This man is very sensitive he has a lot of VERY refined feminine energy in his make-up. You on the other hand have a lot of masculine energy. So the man and woman roles in your relationship could be reversed.
Aries is ruled by the planet mars this is the energy that has to do with men and masculinity. Aries women are natural leaders usually bossy and quite direct occasionally even bullies. Your moon in sagittarius is also in a fire sign (masculine) this makes even your warm and fuzzy nurturing side also kinda tough but thank goodness, always positive and upbeat.
His mercury ( intelligence & communication) in Aquarius is a little heavy and abstract it's square your mercury in Taurus which is direct to the point, unpretentious, simple and earthy. This could create some problems in the area of communication. You'll honestly think he's and "air head." when he's actually a kind of "nutty professor"
His mars in Aquarius ( the sign of asexual or unisex energy ) and your Venus in Gemini if they are in close trine aspect , might be creating some sexual heat. His moon in sensitive peace loving Libra sextile your moon in fun loving, truth telling sagittarius are very different but comfortable with each other. Again depending on the aspect ( degrees) between them. To have moons in harmony is good for living together.
His tender moon in libra and your Venus in Gemini is also a solid attraction he probably has a very soothing effect on you. You probably love eating out together.
The relationship will probably get old quickly however. For awhile Mr. Pisces will enjoy your inclination to take charge but when things go wrong. That peace loving Pisces/ Libra combination can be very passive aggressive, which will drive you bananas.
All the easy going-ness will bore you eventually. Your Aries/ Sagittarius energy loves and needs the drama of a regularly scheduled fight.to blow of steam. On a scale of 1-10 I'd give this match 3. You are very, very different people. Opposites attract but they rarely last.
Why ruin a perfectly good friendship you both have many things to teach each other. He will appreciate your honesty, strength, support and protection and you will appreciate his tenderness, love of beauty, patience, compassion and ability to forgive and forget.
Gather as much of your birth data as you can, Sometimes the exact time will be difficult to get.
then go to www.astro.com and under ' free horoscopes' request a personal portrait. scroll all the way down to the bottom . There you can see the degrees of each sign in both charts. Start by looking for numbers that are the same or close to see what planets are in Aspect. You can also get a compatibility chart
Linda Goodman's Love signs