Dear LIB readers; should I stay or leave my husband?

From a female LIB reader

"I need some advice from readers. My husband and I have been married for 2 years now and we have a son. I first had a feeling that he was cheating on me because he locks his phone and he is always paranoid when I try to even touch his phone. I just got the proof I need that my husband has been cheating on me throughout marriage. He even spends money on gifts for this other lady, gifts that he never buys me. I need advice from your readers. Do I leave him because I need my happiness back"