Should i bother with my ex?

so theres this boy;im eitheir in love with or i think i still love him'im lost i can honestly say.but damn i miss him so much.were together back in july07the first time we got together.so neways'our thin was going great back in summero8 but little that i know that everytime he would tell im going to my friends house;he was also seein his friends cousin that lived there,uh which i didnt find out till like september.when i saw him walkin with her & we were broken up'& i was like whos that'but yah we did break up alot'but we were always gettin back with eachother'.ah but he never did say nothin that he was with her'i asked him why he was walkin with her he was like i was showin her'er cles i didnt care much cause love is love'so watever you know.but neways one day we talked all night & he said hell change his ways but the next day he had all this hickey's & left me heartbroken but dumb enough to get back with him.and one time she was like ive been with him for 5months i was trippin like ive been with him all that time she was like i was with him on his birthday which made me feel stupid cause he came to my house to pik up his gift then went back to her.uh i just fight so much to let him go.& though i was dumb to realize he was talkin to her alon'g but even though we never said we were back together 'it was like we were'we exchange ily words'holded hands like we use to'so meaning we weree'.but i would try n hold my pride n try not talkin to him for a long period of time,but then he started kallin me again'back this summer which uh i love him so of course i talked to him,but he was like lets go out to eat'but anywho;i found out that girl was pregnant'ouh wich broke my heart really bad i cried.uh but he says its not mine that he cheated on him with his friend but hes still piks her up like okay wat does that mean.but i just tell em like boy i dont love you yous a fool.but i just keep my prid n dont let em get the best of me.which i dont know if i should fight for what i love or just let it go like ive work so hard to do.but sometime i look how my bumpy road ahead of me is & im just like confused i dont picture my life without him.hes my first love.but i think just keep going'strong like i have right.i was with him like 1 1/2 yr does it mean he cheated on me yah,but also she got between our relationship cause she knew we were together & when at that time i had no ida she xsisted.but i guess karma will get the best of her.