Im scared

So i’ve been dating this hoy for like a year and 7 months, ad i don’t feel that spark anymore. He says he loves me but i don’t feel it. However, i’ve talked to other guys and them guys are so mature that i feel like cheating on my bf. I don’t know if i should breakup with him or not. i don’t want to hurt his feelings and neither mine (i’ll get over it eventually) but we already have planned a future together...