I am a Pig and my love is a Snake and he is younger. Also, I am Sagitarrius, he is Leo.

According to Chinese Astrology, this pair is not the best match. They will mistrust each other and they both irritate the other in the end. But if you want to keep a good relationship, you should work hard on it.
This pair can get along very well at first, but later, it will change when they find the other's disadvantages.
However you are a sagitarrius and your lover is a leo, it may be a good pair.
In my opinion, if you like each other and love each other, everything becomes less important. You can stay together.