Re: is he cheating on me ?
First... Saturn is in the 7th: you already know the answer or you have made this question to your self in the past, no matter if you made a chart or not "This is the irony of horary astrology" jojo.
But if you want to hear something...
The answer is: No he isn't cheating. But he maybe did in the past.
The ruler of he's 5th house is Saturn... and he already aspect it. Its separating = past.
He is aspecting you by applying aspect but its a square, and Mars is in Virgo, the sign where Venus is in Fall. Venus is Rx flowing to Mars so he feels some guilt and want to stay with you.
Anyways the thing here is that he may not be feeling very comfortable with you. Maybe you both have to talk about the actual problems you are facing in your relationship and talk about things you like and dislike about each other.