Avoidant attatchment.

recently ive been wondering whether im really into him. Ive been in many relationships but non reallly lasted as long as ive with j. And the only difference i noticed was that the others gave me alot of attention and treated me way better than j did even at the start of the relationship to the end. Recently j who orginally didnt treat me much as a girlfriend suddenly started being more of a ‘better boyfriend’ eg.texting more saying we should get married and a sudden increase of affection. This made me in a way lose feelings? But im still scared to leave j. I havent been able to open up either. Im lost on what to do now and communication is hard as weve not been able to find a time to meet up so all chat is over text.