Your jealousy is totally valid....you don't know him and your relationship has not been built up yet....that's why I hate to add the guy that I'm dating into my facebook....I'm keeping my facebook for just family and close friends....and I hide my wall to not have conflicts....there are too much into FB....I was so miserable and jealous when I broke up with Aaron and honesty I think he used FB to hurt me....when we broke up, he was just meeting girls and adding them to FB....before he was against of it all....I was the one more into FB....but he took a revenge from me....then I just deleted him and his friends to not see any of those photos or comments....and honesty, I'm happy with my choice....
If you want to have a relationship with this guy, remove him from your FB and tell him why....then you can add him when you guys have steady relationship....and you are not bugged by a random girl putting comments on his wall....
The guy that I dated yesterday didn't have enough photos on the online dating site (well probably if I was seeing more photos, I would not have gone out with him at all)....when I asked him for more photos, he said he can add me to his facebook....I said no....I'm glad that I didn't, because I didn't have any chemistry with this guy....argggg....I'm still even pissed of going out with him....I was so tired and preferred to have a nap rather than going out with this guy....he lied even about his height! sure his PHD was a fake too...hehehehe....he's telling me his from my city, then he had a thick accent....I said what your accent is from???? he denied to have an accent....gosh....it's like me speaking English as a second language denying having an accent....hehehehe.....
Belle....try to stay away from things that trigger jealousy or any other bad emotional feelings for you.....your peace of mind is more important than anything else....

take care and let us know how you are
xoxoxoxo
Marjan