My gf says im the best bf she has ever had. should i trust her and stay with her?

iv benn hert so many times before, and cheated on, and i dont know if i can trust a nother woman on what she tells me, yes she showes me that she loves me alot but i dont know if i can trust her. i dont want to get hert again and im wanting a forever kinde of love. i rlly am rddy to finde the one but my gf and i argue alot and i dont think she rlly knows how much i need this love even though she said she does. iv always benn the tipe to always be true to the one i love and to be vary respectfull. wev ben togather for 3 months and my hart says to be with her. what do i do? do i stay with her or should i just give up?