Caught him checking out alot of girls....

I am very inscure lately about my relationship with my partner of a year.... today I went to get assessed for my pregnacy I'm 37 weeks. My doctor looked at me and said everything checks out so I don't know why your discharge is so much. I'm testing you for STD's which shocked me.... I said why? She said I think that's what it is. Which leads me to I haven't slept with anyone but my current partner who got me pregnant back in febuary. So I confronted him.... said did you cheat on me? He said uh no. But than I seen him lie to my face. I said you better hope non of those test come back positive. He laughed and huffed and did the thing he does when he lies.... I srugged it off.... upset and tired I didn't want to think about it. He also tryed telling me you can get claymidia without sexual stuff and it sometimes magically happens which to me I laughed and said no actually is a sexually transmitted infection. And he said uh okay. Than we tryed having a good night. I did things to please him as he always wants but I didn't want. I don't even enjoy sex anymore. Than later we went out to this super fancy upbeat place for supper. The bar and lounge on one side and the dinning on the other music blaring and all female waiters in black tight outfits. Skirts with low cut tops etx.... it didn't bother me at first. I'm not the jelouse type kinda didn't even notice. But as the night went on. The waiter leaned over the table and he winked at her. Than another waiter across from our booth was cleaning off another and he was looking her up and down like she was a desert.... he just kept looking at them with sex eyes. Worst part is these are the girls I will be working with at this new club/ food place once I'm done my pregnancy and maternity leave of 4 to 6 weeks.... I feel so hurt. I called him out on it and he lied to my face only to admit he was stairing at them later on that night. So here I am 168 pounds of pregnancy ( swollen Ballon feet and ankles, water weight, placenta, baby, amniotic fluid, and extra blood.) Feeling fat, ugly and like I really don't fit what he wants anymore. I cried once we got home in the bathroom so He didn't know. It really hurt me and made me wonder if this is even the right relationship anymore. Not to mention he postponed our engagment for 4 months now. He told me about the ring. Told me to be patient. He has it but it's collecting dust ok a shelve. I haven't touched it just waiting patiently for him to propose. But at this point I think if you wait that long you don't want to marry that person. It shouldn't be a hard choice.... I don't know what to do ladies what would you do. My heart is hurt, I feel like my stomach is in my throat. I don't even want to look at him....