<human>: I recently found out that my boyfriend of four years had lied to about going to coffee with an old friend(female). They hadnt seen each other for years, met randomly at a bar and went  for coffee the next day. I asked what my boyfriend did that day, and he lied to me saying he had stayed home all day. When I found out two months later, my boyfriend sort of apologized but also blamed me for it, saying I would have been jealous. Now, I know this girl from a few years ago - she blatantly hit on my boyfriend in front of me, touching his thigh with me right there. With that said, she was extremely drunk when that happened. Now, I demanded to see my boyfriend's messages with this girl to prove that he wasnt hiding anything, but he had deleted most of the messages so I wouldn't see them, except the ones from a few days ago. One message in particular bothered me: "I can't sleeeeeeeep:(", from her. Late-night text messages like that seem a bit flirty to me, but maybe I'm overreacting. I'm not sure what to think; deleting text messages seems really dodgy to me, he constantly tells me I'm overreacting. I feel like I can't trust him anymore - he's only sorry he got caught in a lie.

Can you condense the text into a few key points?
<bot>: My boyfriend went for coffee with an old female friend, lied about it, and had deleted all of their messages. Should I be worried?