am i in love?

So last night i was on the phone with a close friend of mine . Weve known eachother since i was 14 i am turning 19 next week , so we known eachother for about 5 years maybe 6 and we never really officially dated ever we did flirt tho and i would tell him anything and then we stopped talking for two years we started talking like a week ago and weve been catching up face timing every night all night and we text all day and he has been really sweet and hes been kinda flirting and what not i have to.. and well last night we talked on phone and he was being a romantic sweet ass guy like ive never seen this side of him , i have seen a bit of it a long time ago but not this much hes like someone different but in a good way and last night he made my heart melt over and over again telling me the sweetest things my chest felt soo warm for some reason ive never felt this.. no he wouldnt be my first bf.. bur i feel so comofortable with him, and everytime he would say something sweet it just made me roll my eyes like if i was orgasming lol but i wasnt turned on or anything its just weird .. haha but my chest felt so warm like a good warm and it felt good i kept squirming around my bed laughing and smiling to his voice. Sorry that its long ladies help? Is this in love ?