Not getting off..

When I masturbate (which is rare) I do it for like 10 mins of just clit stimulation then I get bored or I stop feeling as horny and just give up.. I feel like I’m partly ashamed of it? I dont know I just feel like I can’t get the job done myself and I’ve tried different things I like but I can’t get myself off? I dont know why. I never get anywhere near as horny as when I’m with my boyfriend.. when I’m alone I can’t get to the level I need to and it’s so frustrating. My boyfriend will sext me and he can get off after just hearing me say something and I just feel sad that I’m missing out 😂 cause I don’t get off unless he does it and I wanna be able to do it myself!!!