Advice please! 😭

How do I let go? How please someone help me ): only talks to me when he wants too I’ll go over we will have Sex cuddle and then txt a little the he will stop I haven’t heard from them in 4 days how do I stop trying to want him I hate it soo much please I know I’m stupid I just need a strong woman’s advice or just advice in general we have major history by the way