Should i ask my gf if she loves me.?

ive been wit my gf for 5 months. she thought she was pregnant this week. n she started talkin bout havin a baby, movin out, n havin a family wit me. i jus wanna know if she loves me or if shes already in luv wit me. (im jus curious) also i really really like her. im not sure if im in love wit her either. shes my first gf n im not sure what luv is or how it feels. all i know is i think about her all the time, all day everyday. we got in an arguement a few days ago n she almost left me. she told me tex me if u want n hung up on me. when she hung up i felt like i had lost something really important to me. almost the same feeling as when my grandma died. my question is, should i ask her if she luvs me, n, am i in luv