Please answer me...want to know

In my class there is a boy who had a crush on me for one week he didnt told me but i just felt and after some days a new girl came to our class and then they both were best friends, he didn't cared for me but after 4 months he has been so sweet to me and from the other girl he had a fight, now is he jealousing her or he really wants to be my friend? After that 4 months period he chats with me every now and then but nowadays lil bit...cant understand the situation and now i really love him..please help me??