Search Results: signs of low self esteem

I've started dating someone online for a while now and I've had a few signs that made me suspect he's catfishing me.
It starts with the fact he seems to constantly reject sending me a picture of him and now we talk on kik and for those who know that app you can take pictures from your camera... So for some reason every picture he sends me even if its objects are never taken at that moment from the camera he always seems to be sending them from the gallery.
I've looked up his name online nothing came up at all and when I told him all I want is a picture he nearly broke up with me (and from what I've heard he broke up with his ex for this reason cause she did that too and her friend was going around looking him up)
On the other hand he's extremely loyal and speaks truthfully all our mutual friends we have state that loud and clear and its not hard to see it in him so its hard for me to understand if he's cat fishing or not cause he's such a sweet loyal person If anyone knew him you would probably understand there's just so much good you can say about the guy and thing is he has told me he's got made fun at by one if his exs before for something about the way he looks so there is a possibility he's suffering from low self esteem and insecurity I don't know and he also sent me 2 pictures where it claims its him although I was sure I saw them online I did an image search and nothing came up but still the signs kinda worry me and I don't know what to do... Me and him have been dating for a while now so breaking up with him would be the hardest thing I have to do in my life and I don't want that but I just don't know what to do anymore or where to take it from here
Do you think he's a catfish or not?