Is he even loves me?

I don't understand if he loves me or not. Sometimes he flirts with other girls, not too much. But he always looks at me out of everyone. He talks to me and follows me around. And sometimes he lies to me. I'm starting to suspect him more these days. Yesterday I saw a very small red mark on his neck. When I asked him, he said that he gets allergic when someone touches him with force. He explained a lot, but I'm an overthinker girl, so I don't understand whether he's telling the truth or lying.
Is he even loves me?
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