1. He doesn’t ever make you feel like you’re the first priority. While you don’t necessarily always have to be the priority in the relationship, you have to know that you’re on top at least most of the time. If your partner is constantly deprioritizing you for other things or other people in his life, then you have to consider the possibility that this relationship just isn’t as important to him as you wish it was. Read more on link below
2. He makes an effort only when he wants something out of you.
There’s always some form of ulterior motivation behind his good deeds and you know it. Whenever he’s being nice, sweet, or romantic to you, it’s always because he’s trying to get something out of it. He never expresses his love for you just for the sake of it. He always has to get something in return.
3. He doesn’t try to express an interest in your life.
You should be the number one star in his life. It should be you who is running through his mind all day every day. He should be borderline obsessed with your life and all the little facets of it. But if he starts acting disinterested or detached to you, then that is certainly a sign of trouble in the relationship.