Hi cel70,
Welcome.
May I suggest: the next time you're on your friend's computer,
download and install MultiGo -- it's freeware and I've been using it for years on Windows.
You can download it --
Here .
After you have MultiGo running on your friend's computer,
you can record and edit your game there.
Then, post the SGF text here on the forum.
( At your level, I recommend you finish 100 games -- if you haven't done so already. )

245,

249,

257 -- These 3 moves are very strange.
If you play B19 on

245, you keep your 4 points locally: C19, D19, E19, and J19.
But your 3 moves above KILLED your own 4 points, completely voluntarily by yourself, un-forced.

Even at the last moment, if you play B19 on

257, you still keep 2 points here: ( C19 and J19 ).
Perhaps you were so excited you thought J19 is a false eye, so everything to the left of it automatically became worthless.

Your game:
(;CA[Windows-1252]AP[MultiGo:4.4.4]SZ[19]C[B+7.5 ( 6.5 komi )
B+13.5 ( 0.5 komi )]
PB[You]PW[Aya]KM[6.5]RE[B+7.5]MULTIGOGM[0]
;B[dp];W[pq];B[en];W[qc];B[dj];W[cd];B[kp];W[fc];B[dg];W[lq];B[lp];W[mq];B[de];W[dd]
;B[jq];W[do];B[co];W[eo];B[fo];W[cm];B[dn];W[cg];B[ci];W[mp];B[jc];W[ed];B[kc];W[ej]
;B[ck];W[gj];B[mc];W[dk];B[dl];W[cf];B[ek];W[qe];B[ei];W[gl];B[fj];W[il];B[le];W[ho]
;B[nf];W[ip];B[hq];W[kl];B[hc];W[iq];B[oc];W[ir];B[pc];W[qj];B[qd];W[rd];B[pd];W[qh]
;B[oe];W[nk];B[lg];W[pb];B[bm];W[oo];B[dr];W[ob];B[nb];W[rc];B[bh];W[qn];B[dh];W[ic]
;B[id];W[gp];B[ep];W[li];B[go];W[bg];B[pf];W[ce];B[qf];W[rf];B[fb];W[gr];B[db];W[hd]
;B[cc];W[bc];B[bb];W[dc];B[cb];W[bd];B[eb];W[rl];B[gi];W[gb];B[fa];W[ab];B[ga];W[hb]
;B[ib];W[gc];B[ha];W[ff];B[ag];W[gh];B[hj];W[ge];B[gk];W[if];B[jj];W[ni];B[oh];W[ij]
;B[ik];W[ln];B[kk];W[lk];B[ph];W[in];B[hh];W[hg];B[jl];W[pi];B[km];W[hn];B[ll];W[kn]
;B[lj];W[jm];B[mk];W[mh];B[nl];W[fm];B[nj];W[jh];B[ok];W[mg];B[nn];W[ih];B[pm];W[jo]
;B[po];W[mn];B[no];W[nr];B[op];W[qo];B[pp];W[qp];B[je];W[hl];B[fh];W[me];B[pj];W[df]
;B[oi];W[qi];B[gg];W[kh];B[ii];W[hf];B[lh];W[lf];B[kf];W[mf];B[kg];W[ki];B[af];W[er]
;B[fr];W[fs];B[fq];W[gq];B[eq];W[kj];B[es];W[gs];B[fl];W[nh];B[ql];W[qg];B[rm];W[qq]
;B[rk];W[rj];B[rn];W[mj];B[ro];W[rp];B[sp];W[sq];B[so];W[lb];B[ma];W[jg];B[jf];W[la]
;B[mb];W[gn];B[mi];W[oa];B[mj];W[pg];B[gf];W[og];B[oj];W[ng];B[lc];W[ig];B[nd];W[ld]
;B[kb];W[kd];B[jd];W[ke];B[eg];W[ae];B[ef];W[ee];B[sj];W[si];B[sk];W[ai];B[ah];W[lm]
;B[mm];W[mo];B[em];W[oq];B[fn];W[gm];B[np];W[qk];B[sl];W[ic];B[ie];W[he];B[hc];W[md]
;B[ic];W[pk];B[ne];W[pl];B[qm];W[bf];B[ea];W[ol];B[om];W[aa];B[da];W[kl];B[fg];W[fe]
;B[km];W[ch];B[bi];W[kl];B[ca];W[jk];B[ba];W[ac];B[jl];W[km];B[jk];W[ji];B[nq];W[hk]
;B[fp];W[pn];B[on];W[ec];B[ia];W[re]C[B+7.5 ( 6.5 komi )
B+13.5 ( 0.5 komi )])