engaged to one guy in love with another

My fiancée and I just got engaged, I just met a cute guy his name is Liam he's really cute I haven't felt this way  since my ex Josh and I went out Josh was my first love and my first heartbreak my fiancée and I are happy together his name is Payton he's cute and all, but when I'm around Liam I get nervous, my hands get sweaty, I feel like there's butterflies in my stomach, and I get shaky, and my heart skips a beat or two I haven't felt this way since I dated my ex Josh please no judgement I am sensitive about this subject.