I don't know why my crush's friend is texting me?

I dont know my crush's friend. And he started randomly texting me in fb. He started the conversation about my crush, then he sends me pics of the game they are playing but the main focus is my crush. Then he sends me his number...

I don't know what it means. Cuz is always hard to figure my crush out when we are at school. So does it mean he likes me? Since his friend is texting me about him? Like when my crush's friend and I talk is mostly when he is hanging out with him (and they seem to read my messages cuz his friends text me what my crush says). And is only when my crush is the topic of conversation.

I dont want to get my hopes up. Why would my crush's start texting me?
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His excuse was that we both know him thats why he started talking to me. But I have a sister who does to but didn't text her...
I don't know why my crush's friend is texting me?
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