I just feel like my partner looses interest in me and everytime I mention it we start to fight...

It just makes me feel so horrible since I feel like it´s my fault, because he spends so much time with me and is rly nice to me, but he just doesn´t compliment me as much as in the beginning and generally I just don´t feel so special anymore. I tend to compare the start of the relationship and our "getting to know each other phase" a lot to how it is now and it honestly tears me apart. If I don´t feel fullfilled with this lack of attention I feel like I need to get the attention somewhere else which I don´t want to, ´cause I love him. These fears are definetly linked to things I have observed and experienced while growing up, but it´s so difficult to differentiate between him actually not loving me or feeling unloved. However when I feel unloved it´s simply so real to me and I don´t know what to do anymore. I feel so self destructive in every kind of way, but it seems to be my reality.