Is it bad that I can't get over the feeling that my girlfriend might be over me?

Ok so in my last 4 relationship all ended up with my ex's cheating on me and it has been 3 years since my last relationship and I've started dating this girl that i really do love but in the back of my mind i always have the same thought stuck in my head and it's that any day she could just stop loving me and cheat on me and or just stop loving me especially because i suck at giving and taking compliments and i almost never get to hang out with her because of my school and work. I love to buy her gifts but she would prefer words of affection but I'm unable to do that. What should i do?

Is it bad that I can't get over the feeling that my girlfriend might be over me?
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