stressful situation

So my boyfriend broke up with me earlier this year, and after a couple months I started to move on and was planning to have sex with one of my male friends. Him and I never did anything though except flirt, because weeks after that my ex asked for me back. And of course I did so we told each other everything, how I almost slept with one of my friends, and he almost slept with one of his friends. We started working things out and many months later, here we are now, back together again! He and I remained friends with the people we almost slept with though since we still only saw them as friends, but he's been a little shady with getting all close with the girl (physically).
But there have been 2 incidents so far, where I needed a ride. My boyfriend and I don't have a car, so our parents pick us up (we're both 18, and only have permits).
The first incident was at the park, we were hanging out and around 7 my parents told me they were unable to pick me up. The only friend I know with a car, is the guy I almost slept with. I asked my boyfriend if it was okay to get a ride from him since I live almost 3 hours away (by walking), but he said I couldn't. So while he got picked up by his mom while it was still bright out, I had to walk to the nearest shop (which took an hour to walk) with 2 heavy bags since we hung out right after school. And after that, I had to wait 2 more hours to get picked up, and my body was sore for days. The walk was so scary for me since it was dark and I had no way to protect myself.
The second incident was that I had to work after school. This was a job I just got recently too(my 4th day working there). And I couldn't get a ride from my parents since they were working. So I asked my boyfriend if I could get a ride from the guy since he was the only ride I have, and he said no. I missed worked, and had to stay after school until 8 to get picked up by my parents. But the school closes at 6, so I had to wait in the park across. And my friend who works with me said they already might fire me since I missed work already. But he tells me that he feels really bad though for both of these things happening!! 
He doesn't want me getting rides from him, because he think he and I are going to do stuff in his car. I wouldn't do that to him, especially if we're together. I just don't know what to do. I feel like I'm mainly in the wrong here for some reason. 

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