He send you those pictures so that you comment on them and it can lead to a conversation, which can even go as far as flirting. He's just sending his pictures and is not trying to initiate a conversation, which hints that he probably sends those pictures to other people as well. I think he just wants to flirt with you have a good time, and nothing serious.
I have a friend who followed a guy on Instagram because she found his poetry deep, and he followed her back. She would show us his poetry and appreciate it. She started liking and commenting on his posts. Soon he started tagging her in his posts (he tags some of her other friends as well) and started inboxing her his poems (he sends them to other girls as well). She would comment on the poems he would inbox her, which would lead to some other conversation as well, but nothing serious. She would mention that he has a nice jawline (which he does) and we would simply agree with her. Then one day she told us that they chatted whole night. With passing days, these conversations became a thing of every night and she became very close to him, as a friend and we would jokingly make them a couple.
One day she came to school and told me that he has a girlfriend. Me and other friends started joking about that, but all of us could sense the tears in her eyes when she would talk about that. After a while she came around the fact about her girlfriend. Then, that guy broke up and had no links with his ex. All of us could feel that how happy our friend was because of that breakup, but she would say that how depressed he is and she's sad for him. Soon the breakup became a thing of the past and she would openly talk about how they would do future planning and other stuff happening in relationships. Now they chat for hours and hours (he lives in New York and we live in Pakistan) and she would even ask for his suggestions about what to wear for parties etc. Recently we had a party and all my friends were insisting on wearing heels but she refused, because he told her to go with flats.
The matters have gone so far that each of her sentence would start and end with him, and she would compare her love for us with his love. She would always be mentioning their wedding and their future together. I know she's in love with him, but does he love him?
We tell her that he's just a dream but she won't listen. But all of us know that all she can gain from him is heartbreak. From this experience with my friend, I suggest you to stay away from him, 'cause I don't feel he'll be doing any good to you. Rest is up to you.
(Sorry for all this rambling, but I felt all this needed to be said.)