I like my boyfriends friend?

My boyfriend and I have been together for a few years now and don't get me wrong I love him very much but I feel like our relationship has gotten boring. When we're okay with each other we don't do much of anything other than just sit around at home all day. When we're arguing its just constant breaking up and then begging for each other back. I'm happy but at the same time im not sure if thats 100% But anyways my boyfriend has this friend who's in the army that I met the same time I met my boyfriend. His friend and I have been texting for only a month or 2 now but we can talk for hours. I've hung out with his friend a few times with my boyfriend of course but we've never hung out alone. His friend tells me things like my boyfriend should be careful because a million guys would be willing to take his spot and things like that. My boyfriend knows I think his friend is attractive and his friend knows I think that as well. We stopped talking for a co uple weeks when he left for army training but he randomly texted me the other day and we've been talking since. He asked for a picture of me and I sent him one and his response was you're cut out for this and I asked what he meant and he said Because you are so beautiful so I said thanks and sent him another pic and he complimented me again and then sent me a picture of him without a shirt on and I complimented him as well and sent another pic back and he said "very cute" and I just said thank you and then that was the end of our conversation. This was last night and we havent talked yet today but im confused im not sure if he likes me at all or if he's just saying that and i guess im just needing advice. Thanks!

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