All this needs is dynamics
Melodically and harmonically, this song is pretty good. However, without dynamic changes, it sounds stale.
I would also try to bring out the drums and vary up the rhythm a bit more too.
Lastly, I would use different samples, or soften/vary the attack on the strings because everything seems to be playing in basic sustain mode.
Those are the main things that stick out for me. But like I said, the melody is fine.
Tanks a lot for the feedback. Ill try to incorporate these things next time i decide to fuck around in Fl studio.
Please contact me if you would like to use this in a project. We can discuss the details.