Are you giving him enough time to decide?
I see some very nice synastry between you two. There is a nice grand trine between the two Venuses and Pluto.
There is a nice compatibly between the Sun and Moon in both charts. Fire and Air fits comfortably together and communicates well.
However there are a few things that concern me. Your Mars is conjunct his Sag Moon. That can be exciting, energizing and passionate. But he might also feel that you are impatient and too aggressive at times. And a bit too blunt?
You are predominantly 'mutable' energy. Your Sun, Moon and Rising are all in the Mutable Mode of energy. Mutable is changeable, perceptive, intelligent and sometimes too preoccupied mentally.
Your crush has the Sun and Mercury in Aquarius, which is the fixed mode. Fixed energy is slower, more deliberate and a tad stubborn, compared to Mutable.
So if you do like him, you might have to slow down a bit and see if he catches up.
The one thing that concerns me the most is the opposition between your Sun/Jupiter and his Uranus/Saturn.
There is a huge difference between Sun opposed Uranus in synastry and Sun opposed Saturn. So when you have the two oppositions blended together, it can feel like an internal struggle.
Sun opposed Saturn is a tendency to try and make things permanent. Sun opposed Uranus is the tendency to 'cut and run.' So you may both give mixed messages and confusion ensues.
Your potential partner has Venus in Pisces. I think when he does give his heart, he loves fully and unconditionally. But he has to thaw out his feelings a bit. He is guarded and deliberate.
How long have you been hanging out together?