how do I help my self with being in love?

im 17 and I’ve been on and off for 5 years with my ex boyfriend!! we started off as best friends in the 7th grade and 8th grade he asked me to be his girl I said yes and 3 months later we broke up and stoped tlking for 3 years 10th grade year we some how started talking again and ended up getting back together it lasted 2months but this time sex was involved(we lost it to each other) and after 2 months we ended it again we stoped talking again and 4 months after our brake up I found out I was pregnant I didnt tell him and lost the baby…a year after loosing the baby I sent him a e-mail asking for him to forgive me for the brake up and he did,,,he had just broke up with his girlfriend and was heart broken so I told him it was going to be my dudy to put a smile on his face and I did we had sex again and 2days after having sex his ex called him saying she thinks shes pregnant and he told me he loves us both and didnt know what to do I broke down into tears and told him I loved him and didnt want to loose him again and I tol him about me loosing the baby he broke down and looked mad for me not telling him and told me I wouldnt loose him well 2 weeks later he ffound ot that she wasnt pregnant but he wanted to fix his problems with her so he ended what we had but now I feel like im the pregnant one but I highly doubt it!!!… all that said and done what should I do?