FWB or relationship?

I've had a FWB for over a year now, although we've liked one another for two years now, and it took me a while to agree to sleep with him; none of us wanted commitment at the time. We've been through a lot, and I stopped talking to him last summer as I started dating someone and stopped liking him, but he was persistent on meeting up with me to patch things up... Eventually me and my new guy broke up and I started talking to my FWB again, with no intention of meeting him again though. However he told me how much he liked and missed me and wanted to spend time with me, so we went for a few meals etc., and eventually started having sex again. There's no doubt that sexually we are perfectly compatible, and as we've been meeting up more frequently emotions are getting stronger. He's reassured me on many occasions that he will never hurt me, that the thought of getting with any other girl hasn't crossed his mind in all the time he's known me, and if I go days without talking to him he gets in touch first and tells me how much he misses me, but generally we speak every day from the moment we wake up up until we go to sleep. Around Christmas time he upset me a bit, and I went on a date with someone I'd recently met - I told my FWB and he was annoyed to say the least, and also said how he couldn't see us in a relationship, and that he knew this would eventually end, maybe when I move away for university. His attitude has completely changed since then though. We've spoken of going on weekends away and he's been buying me gifts, and he has tried to convince me to stay in my home town for university so we can still be close, as he was worried I'd lose interest in him due to the distance if I were to move. I've reassured him that I won't and I just hope that we can make things work. He's been wanting to see me a lot more recently, keeps telling me he misses me and can't stop thinking about me, and he gets upset when I'm upset. I know that I'm definitely in love with him, although I can't work out whether he is... he once told me he loves me although he was drunk. We've always been exclusive and have recently started opening up to one another. What I'd like to know is whether it sounds like I'm in a typical FWB situation or whether it's beginning to sound more like a relationship?

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