help!

I have posted a few times about my ex and I being friends. We were hanging out every Friday night and now everything has stopped. He even said that he guesses he still loves me. He told me that he's not ruling out that we could TRY to work things out. Lately there are no text messages or very few. I know he works m-f 8 to 5 and goes to school 530 to 1030 and he just says he's busy and tired and there isnt another girl. On the weekend he just disappears. If we actually talk and I question him he yells at me and tells me he's telling the truth, but it doesn't matter because I don't believe anything he says. I was supposed to pick him up from school tonight and he got hurt at work and didn't go. He told me he was resting and would text me later. Well...nearby friends on fb shows he's no where near his home. What do I have to do just to get the truth?