Hello lovelyleo, Mars conjunct Sun will make him somewhat aggressive but in the 2nd house it's likely he is aggressively collecting stuff (money, property?) something that is important to him.
Moon/Aries can show he speaks in the moment, he's kind of impulsive, only taking a month to fall in love (but then again Cancer wants to be in love).
The way to make him happy?
Let him bring you down to his depressive "I can't go on" mood and he'll recover quickly.
You my Fire sign sister will still be down in the dumps.
Water wallows in it's many moods while you feel as if your fire has been put out. We don't recover as easily.
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"For all those who believe, expect a miracle.”
Linda Goodman 1925-1995