i need advice

ok im 20 dating a 35 year old. we argue n fight over stupid things..(like me wating to cuddle n kiss him n him nt liking that... or me nt having a back bone) he makes me so happy though when we dnt argue n hes so sweet to me... but he likes to hide his phone from me he wont even look at it near me n if he does he turns the screen away from me. is he hiding something or am i paranoid?? ive fallin in love with him i dnt wanna lose him....