Maybe it will be the same situation as with Abhi. He was always with Pragya and was geniunely concerned about her. But till the very last moment he didn't think as love or realise it as love. Only when pragya confessed, then he started to think about it. So maybe Prachi too will be same. Initially she might not believe what he says but later slowly she might realise he loves her and she too has developed soft spot for him.
Maybe you are right. Maybe prachi will only realise love for him after getting to know his love for her.