Do I deserve better?

Every. Single. Day. My boyfriend accuses me of doing something wrong on my phone (like talking to guys). Which I do not, ever. We have lived together over a year and I prove my love to him every single day trying to be the best girlfriend possible. I got home from work today and was sitting on the couch on Facebook and he looks at me with this stupid ass suspicious look and takes my phone from me and doesn't even look through it really just sees my reaction. So I say ok you can look through it just let me see your phone. His face became panicky and he tried really hard to stop me from touching his phone and so I looked at his recent tabs and the only one up was Firefox and he had deleted his history. I'm pretty sure he was watching porn (because we discussed porn was a no in our relationship because he was choosing porn over sex with me for months) but who the hell knows now it could be a dating app or cam girls or who knows. Then he tried to lie and said "I don't use Firefox I use google." But I know that's a lie because I see him use Firefox all the time. I tried to be calm and nice and I told him "if you tell me the truth I won't get mad. I just want honesty" and he just kept lying. This is so stupid and I'm mainly pissed because why the hell am I in a serious relationship, giving all my heart and soul, living with a man who is okay with lying to me and hiding things and accuses me of doing wrong every day???????