Love trainglw

Kate
My boyfriend and I have been best friends for 2 years and only started dating 2 months ago. Although I really like him I am already starting to get bored. I've been talking to this other guy for only 2 days- who is older, good looking and we have great banter.(we have also had 2 hour phone calls each night)  Although it's been such a short period, I already feel like I want to dump my boyfriend for him, however I care about his feelings and don't want to hurt him. PLEASE GIVE ME ADVICE