Can my relationship be fixed or is it too far gone?

weve only been together 3 months. like all relationships, it was perfect at first. this last month it has been getting worse and worse. ive talked to him several times about being more affectionate and caring and i just dont think he gets it. he told me he thinks he might be afraid of commitment. [thanks for telling me now.] hes never sweet to me, he makes me unhappy, and i feel really bad about myself. he always ignores me and is constantly texting, or messing with his phone. and im pretty sure he would rather play video games than be with me. this guy is 25 years old! i constantly think hes cheating on me even though i know hes not. he doesnt like to cuddle, hes not into pda or holding hands. im basically miserable. i feel so hurt all the time, but he just doesnt do anything about it. he said he would never hurt me on purpose, and i know hes not trying to. he just has no idea how to be a boyfriend, but he doesnt seem to be making an effort. is this guy worth my time. is there some deeper issue? hes very scared to open up for fear of not being 'tough' anymore. should i try harder, or give him space? or is this just his personality? thank you for reading, any and all advice is appreciated.