Hi. My main thought really is just to proceed with caution, and to be sure that if a relationship is established, that you both have the same expectations. I certainly wouldn't emigrate or allow him to do so until you are very sure, due to his extreme Piscean nature and lack of earth (and lack of air compared to water).
In terms of dating yourself, he is perhaps a kind of caricature of your Piscean Sun because of his three personal planets in Pisces, his Sun Neptune square, and his four personal planets in the 12th house.
Since much of his chart is concentrated between the end of Aquarius and the first part of Aries, it is worth taking note of where these placements are in your chart. With his ascendant, his Aquarius Moon, and his Pisces planets being in your first and second houses, you may feel that his energy is in tune with the way you need to establish yourself as an autonomous individual. On the other hand, after a while you may feel that he is under your feet, so to speak, when you try to establish your autonomy, this being likely to the extent that he has unmet needs around these placements that he expects you to accommodate as you go along.
On the 17th of January, the Saturn transits I mentioned in another post are both within a degree of exactitiude.
Transiting Sun and Mercury have just crossed your natal ascendant and approach your natal Venus, suggesting that this time will be significant in one way or another.
Transiting Venus and transiting Pluto are also conjunct, with both approaching your Sun/Jupiter midpoint (Pluto less than a degree away and Venus almost exactly there), with both transiting planets making sextile aspects (especially close from the faster moving trigger planet Venus) to both Sun and Jupiter. Again, a sense of this being a significant time in some way, and with the Saturn transit to natal Sun and Jupiter as well, it does seem to be a time for you to get more deeply into the watery parts of your nature. It is worth mentioning again that your natal Jupiter is in your 9th house of foreigners.
The two transiting conjunctions mentioned above, with transiting Saturn in the same degree of its respective sign, are worth looking in relation to his chart also, to try to see what expectations he may have for the visit. Also, Transiting Chiron, Jupiter and Uranus are forming a configuration at that time - all between five and six and a half degrees of their respective signs - these have now separated from making aspects to your natal Moon Uranus opposition, but may be triggering something in his chart.
The only thing that jumps out at me from the above list of transits is that his his nodal and horizon axes are conjuncted by transiting Uranus at the moment, with minor aspects from transiting Jupiter and Chiron.
Something else though is that the transiting nodal axis is squaring his natal Moon Saturn opposition. This, and the transits to your watery Sun, tie in nicely with the idea that he is looking for someone through whom to discover more about his more independent side, while you are looking for someone to discover more about your more emotional side.
You both have Pisces Suns, air Moons, so there is obviously some compatibility. But take care about the possibility of polarisation mentioned above.