there is a reason you are taking olanzapine....you are clearly paranoid. no normal person records their partner, sticks their hand down their trousers and keeps tabs on where they are and what their neighbours are doing. you will obviously keep doing this until you get 'proof', but in the meantime you are going to drive yourself doolally. if you do not trust your partner - the normal thing to do is finish the relationship and concentrate on getting yourself better. by doing the activities you are describing, you are playing into everybody else's hands and confirming the behaviour of somebody who is paranoid and needs help. you need to recover, regain your mental health, concentrate on yourself and then embark on a relationship with somebody you do trust - if you do not do any of these, then your life will continue to struggle on in the messy way you describe above. i have mental health problems and am a psych nurse - so do know exactly what you are describing and experiencing - the only way to regain control is to take your meds and reduce your symptoms to a manageable level where you can function healthily in a new relationship. can you imagine how your partner must feel if he is actually doing nothing wrong and you are constantly accusing him of infidelity, lying and sneaking around? and your neighbour?
to be frank, most people do not have the time or energy to sneak around to the extent that you have described.....and it sounds like you need to take stock of your life. however.....if you feel that you absolutely must have evidence of your suspicions, purchase a concealed camera with audio functions and use this instead of your mobile. there are plenty on the market that can be hidden in a room and they are fairly easy to use. that way, you will have absolutely rock solid pictures and sound of what is occurring.....and this may also help you face the fact that you are/or aren't going completely nuts. i can't make you decide which option you are going to follow, but they are the two things i would consider doing myself. good luck with things.