WHY IS MY BOYFRIEND JEALOUS?

Dear Recess Online Readers, i realy need your advice... My boyfriend and i met about 5moths ago but before we started dating, he told me that i have 2 b very patient being his girl coz he is'nt really into relationships and he is a very busy type. He said he loves me and he really tries as much as he can 2 make me feel loved but he is a jealous type and this jealousy is what's eating into our relationship and straining it+ he doesn't trust me to be faithful to him... Says i'm 2 beautiful to be trusted. Hez being somehow restrained towards me of late and he seems oblivious to the fact that he hurts me. I wish to leave him but i love him. What do you suggest i do?