Can you love your best friend MORE than the person you are dating?

My curiosity about my question has sprung from my current experiences with my best friend. He has been one of my best friends now for about 6 months and we are very close. We say a common 'Love you' sometimes (in a friend way) and we have cuddled before and we often meet up and go on walks. He recently got a girlfriend who's in our year at our school (we're in year 10). He started fancying her merely 2 weeks ago and a few days later they are already going out and apparently she had liked him already a for a few months. He has already changed and doesn't spend as much time as us and he's being blunt on text and everything. It's literally been two weeks since he's developed these feelings and he already seems "in love". I know she's his girlfriend but he talks about her so much around me and I don't need to hear how 'sexy' she is, that's not for me to know. He seems to care for her much more than me and speaks to her way more. It's only been two weeks. And I was wondering... Is there anyone out there who has a girlfriend or boy friend but still cares for their best friend the same, or even more. I know it may seem silly and in I way am I meaning to seem selfish or horrible. But it's hurting me that he's drifting away...