is this normal

So for some time i wanted to go to the gym because i am so out of shape that i can not even run for 10 second without getting dead tired and being out of breath. My boyfriend knows about this and he was at first also happy for me to go to the gym too , because he goes to the gym as well. But ever since he went to work out i kind had in my head i had to keep up and work on myself too before some girl thinks she can get out of her lane. Yesterday after talking with my mother she told me i could go to the gym if i wanted ( i first couldn't because she didn't allow it). That said my boyfriend goed to one jim where there only come men so my mother didn't want me there , so i would go to an other one. And after i told my boyfriend he just got some attitude and said ( why do you wanna go now that i am going too) while he was the one encouriging me and being happy about the idea too at first and now he had been angry and ignoring me since yesterday. I get he is jealous and all, but really is this normal?