Responses

Sure! When someone says "I love you" it's already a serious confession but being "in love " is usually considered to be a stronger romantic feeling, like a dreamy feeling of having found your soulmate. The difference isn't that big but being "in love" is considered more happy and blissful, like the honeymoon phase. If it's still confusing don't hesitate to ask, English is also my second language but I studied a lot to get into uni
Did I miss something I thought they were dating and in love